View source for O'Hare International Airport

{{Short description|Airport serving Chicago, Illinois, United States}}
{{redirect|O'Hare|other uses|O'Hare (disambiguation)}}
{{Use mdy dates|date=January 2024}}
{{Use American English|date=July 2019}}
{{Infobox airport
| name                = Chicago O'Hare International Airport
| ensign              = 
| ensign_size         = 
| ensign_alt          = 
| nativename          = 
| nativename-a        = 
| nativename-r        = 
| image               = O'Hare International Airport Logo.svg
| image_size          = <!-- if less than 220 -->
| image_alt           = 
| caption             = 
| image2              = O'Hare International Airport (Iss069e037725) (cropped).jpg
| image2_size         = <!-- if less than 220 -->
| image2_alt          = 
| caption2            = Satellite image of O'Hare in 2023
| IATA                = ORD
| ICAO                = KORD
| FAA                 = ORD
| TC                  = 
| LID                 = 
| GPS                 = 
| WMO                 = 72530
| type                = Public
| owner-oper          = [[Chicago Department of Aviation]]
| owner               = 
| operator            = 
| city-served         = [[Chicago metropolitan area]]
| location            = [[O'Hare, Chicago|O'Hare]], [[Chicago]], [[Illinois]], [[United States|U.S.]]
| opened              = {{start date and age|1944|02|}}<ref>{{cite web|title=Chicago O'Hare International Airport|url=http://www.airnav.com/airport/KORD|publisher=AirNav, LLC|access-date=October 28, 2016|archive-url=https://web.archive.org/web/20161029031005/http://www.airnav.com/airport/KORD|archive-date=October 29, 2016|url-status=live}}</ref>
| closed              = <!-- {{end date|YYYY|MM|DD}} -->
| passenger_services_ceased = <!-- {{end date|YYYY|MM|DD}} -->
| hub                 = {{ubl|class=nowrap
  | [[American Airlines]]
  | [[United Airlines]]}}
| focus_city          = [[Polar Air Cargo]]
| operating_base      = {{ubl|class=nowrap
  | [[Frontier Airlines]]<ref>{{cite web|url=https://news.flyfrontier.com/frontier-airlines-to-re-open-pilot-base-in-chicago/ |title = Frontier Airlines to Re-Open Pilot Base in Chicago|website=Frontier Newsroom| date=November 21, 2023 |access-date = November 22, 2023}}</ref>
  | [[Spirit Airlines]]}}
| built               = <!-- military airports -->
| used                = <!-- military airports -->
| commander           = <!-- military airports -->
| occupants           = <!-- military airports -->
| timezone            = [[Central Time Zone|CST]]
| utc                 = [[UTC−06:00]]
| summer              = CDT
| utcs                = [[UTC−05:00]]
| elevation-f         = 668
| elevation-m         = 204
| metric-elev         = yes
| coordinates         = {{coord|41|58|43|N|87|54|17|W|region:US-IL|display=inline,title}}
| website             = {{URL|https://flychicago.com/ohare}}
| image_map           = Chicago-O’Hare FAA airport diagram, 10.30.25.jpg
| image_mapsize       = 
| image_map_alt       = 
| image_map_caption   = FAA airport diagram
| mapframe            = yes
| pushpin_map         = 
| pushpin_mapsize     = 
| pushpin_map_alt     = 
| pushpin_map_caption = 
| pushpin_relief      = 
| pushpin_image       = 
| pushpin_label       = '''ORD'''/KORD/'''ORD'''
| pushpin_label_position = 
| pushpin_mark        = 
| pushpin_marksize    = 
| r1-number           = 4L/22R
| r1-length-f         = 7,500
| r1-length-m         = 2,286
| r1-surface          = [[Asphalt concrete|Asphalt]]
| r2-number           = 4R/22L
| r2-length-f         = 8,075
| r2-length-m         = 2,461
| r2-surface          = Asphalt
| r3-number           = 9L/27R
| r3-length-f         = 7,500
| r3-length-m         = 2,286
| r3-surface          = [[Concrete]]
| r4-number           = 9C/27C
| r4-length-f         = 11,245
| r4-length-m         = 3,427
| r4-surface          = Concrete
| r5-number           = 9R/27L
| r5-length-f         = 11,260
| r5-length-m         = 3,432
| r5-surface          = Asphalt
| r6-number           = 10L/28R
| r6-length-f         = 13,000
| r6-length-m         = 3,962
| r6-surface          = Asphalt
| r7-number           = 10C/28C
| r7-length-f         = 10,800
| r7-length-m         = 3,292
| r7-surface          = Concrete
| r8-number           = 10R/28L
| r8-length-f         = 7,500
| r8-length-m         = 2,286
| r8-surface          = Concrete
| metric-rwy          = yes
| h1-number           = H1
| h1-length-f         = 200
| h1-length-m         = 61
| h1-surface          = Concrete
| stat1-header        = Passenger volume
| stat1-data          = 80,043,050
| stat2-header        = Aircraft movements
| stat2-data          = 776,036
| stat3-header        = Cargo (metric tons)
| stat3-data          = 2,074,005.7
| stat-year           = 2024
| footnotes           = Source: O'Hare International Airport<ref>{{cite web|title=Year to Date Operations-Passengers, Cargo Summary December 2024 |url=https://www.flychicago.com/SiteCollectionDocuments/Business/FactAndFigures/AirTraffic/1224%20ORD%20SUMMARY.pdf|website=flychicago.com|access-date=March 21, 2025}}</ref>
}}

'''Chicago O'Hare International Airport''' {{airport codes|ORD|KORD|ORD}} is the primary international airport serving [[Chicago]], [[Illinois]], United States, located on the city's Northwest Side, approximately {{convert|17|mi|km}} northwest of the [[Chicago Loop|Loop]] business district. The airport is operated by the Chicago Department of Aviation<ref>{{cite web|title=About the CDA|url=https://www.flychicago.com/business/CDA/pages/default.aspx|publisher=City of Chicago Department of Aviation|access-date=May 3, 2018|archive-url=https://web.archive.org/web/20180504091650/https://www.flychicago.com/business/CDA/pages/default.aspx|archive-date=May 4, 2018|url-status=live}}</ref> and covering {{convert|7627|acre|sqmi km2|2}}.<ref name=FAA>{{FAA-airport|ID=ORD|use=PU|own=PU|site=04508.*A}}, effective September 4, 2025.</ref><ref>{{cite web|url=https://skyvector.com/airport/ORD/Chicago-O-Hare-International-Airport|title=ORD airport data at skyvector.com|website=skyvector.com}} FAA data effective September 4, 2025.</ref> O'Hare has non-stop flights to 249 destinations in North America, South America, the Caribbean, Europe, Africa, Asia, the Middle East and the North Atlantic region as of Summer 2024.<ref>{{cite web |title=Non-stop Service |url=https://www.flychicago.com/ohare/myflight/non-stop/pages/default.aspx|publisher=Chicago Department of Aviation |access-date=March 26, 2019 |archive-url=https://web.archive.org/web/20190326001740/https://www.flychicago.com/ohare/myflight/non-stop/pages/default.aspx |archive-date=March 26, 2019 |url-status=live }}</ref><ref>{{cite news|title=O'Hare to offer first direct Chicago-to-Africa flights|url=http://www.chicagotribune.com/business/ct-ohare-chicago-to-africa-direct-flights-20180205-story.html|newspaper=Chicago Tribune|location=Chicago|publisher=Tribune Publishing|agency=Associated Press|access-date=April 1, 2018|archive-url=https://web.archive.org/web/20180401075526/http://www.chicagotribune.com/business/ct-ohare-chicago-to-africa-direct-flights-20180205-story.html|archive-date=April 1, 2018|url-status=live}}</ref> As of 2024, O'Hare is considered the most connected airport in the United States, and fifth most connected airport in the world.<ref>{{Cite news |last=Smith |first=Gordon |date=August 19, 2024 |title=Istanbul is the World's Most Connected Airport – New York and Tokyo Miss the Top 20 |url=https://skift.com/2024/08/19/the-worlds-most-connected-airport-chart-2024/?lid=jhs0j9sbnj0i |access-date=August 26, 2024 |work=[[Skift News]] |publisher= |location= |language=en}}</ref> It is also the world's fourth busiest airport and 16th largest airport.<ref>{{cite web |last=Gerves |first=Florence |date= November 3, 2023|title=Top 20 biggest airports in the world |url=https://aeroaffaires.com/biggest-airports-in-the-world/ |website=AeroAffaires |location= |publisher= |access-date=January 22, 2025}}</ref> It is the airport with the most runways in the world.<ref>{{Cite web |last=M.Durgut |date=2025-04-24 |title=Top 10 Airports with the Most Runways in the World |url=https://www.aviationfile.com/top-10-airports-with-the-most-runways-in-the-world/ |access-date=2025-10-01 |language=en-US}}</ref>

Designed to be the successor to Chicago's [[Midway International Airport]], itself once nicknamed the "busiest square mile in the world", O'Hare began as an airfield serving a [[Douglas Aircraft Company|Douglas]] manufacturing plant for [[C-54]] military transports during [[World War II]]. It was renamed Orchard Field Airport in the mid-1940s and assigned the IATA code '''ORD'''. In 1949, it was renamed after aviator [[Edward O'Hare|Edward "Butch" O'Hare]], the U.S. Navy's first [[Medal of Honor]] recipient during World War II.<ref name="airways1">{{cite web|last1=Petchmo|first1=Ian|title=The Fascinating History Chicago's O'Hare International Airport: 1920–1960|url=https://airwaysmag.com/uncategorized/chicago-ohare-history/|website=airwaysmag.com|date=April 7, 2014 |publisher=Airways International Inc.|access-date=April 7, 2018|archive-url=https://web.archive.org/web/20171107021841/https://airwaysmag.com/uncategorized/chicago-ohare-history/|archive-date=November 7, 2017|url-status=live}}</ref><ref name="oharehistory"/> As the first major airport planned after World War II, O'Hare's innovative design pioneered concepts such as concourses, direct highway access to the terminal, [[jet bridge]]s, and underground refueling systems.<ref name="RHBEIoCOIA"/>

O'Hare became famous during the jet age, holding the distinction as the [[world's busiest airports by passenger traffic|world's busiest airport by passenger traffic]] from 1963 to 1998. It still ranks as one of the busiest airports in the world, according to the [[Airports Council International]] rankings.<ref>{{Cite news|last= |date=April 11, 2022 |title=O'Hare Ranks as World's Fourth-Busiest Airport, According to New Report |url=https://www.nbcchicago.com/news/local/ohare-ranks-as-worlds-fourth-busiest-airport-according-to-new-report/2804457/ |access-date=April 19, 2022 |work=[[NBC News]]|location=Chicago|publisher=[[NBC Owned Television Stations]] |language=en-US}}</ref><ref>{{Cite web |last=Josephs |first=Leslie |date=2024-04-15 |title=World's busiest airports show surge in international travel. Here are the rankings |url=https://www.cnbc.com/2024/04/15/worlds-busiest-airport-rankings-2023.html |access-date=2024-04-15 |website=CNBC |language=en}}</ref> In 2019, O'Hare had 919,704 aircraft movements, averaging 2,520 per day, the most of any airport in the world, in part because of a large number of regional flights.<ref>{{cite news |last1=Hetter |first1=Katia |title=This is the world's busiest airport |url=https://www.cnn.com/travel/article/worlds-busiest-airports-2018/index.html |work=[[CNN Travel]] |publisher=[[Warner Bros. Discovery]]|location=Atlanta |access-date=November 26, 2019 |archive-date=November 19, 2019 |archive-url=https://web.archive.org/web/20191119032907/https://www.cnn.com/travel/article/worlds-busiest-airports-2018/index.html |url-status=live }}</ref> On the ground, road access to the airport is offered by airport shuttle, bus, the [[Chicago "L"]], or taxis. [[Interstate 190 (Illinois)|Interstate 190]] ([[Kennedy Expressway]]) goes directly into the airport. O'Hare is a [[Airline hub|hub]] for [[American Airlines]] and [[United Airlines]] (which is headquartered in [[Willis Tower]]),<ref>{{cite news|url=https://www.usatoday.com/story/travel/flights/todayinthesky/2017/01/26/fleet-and-hubs-united-airlines-numbers/96983530/|title=The fleet and hubs of United Airlines, by the numbers|last=Mutzbaugh|first=Ben|location=Washington|newspaper=[[USA Today]]|publisher=[[Gannett]]|access-date=January 29, 2018|archive-url=https://web.archive.org/web/20180212041159/https://www.usatoday.com/story/travel/flights/todayinthesky/2017/01/26/fleet-and-hubs-united-airlines-numbers/96983530/|archive-date=February 12, 2018|url-status=live}}</ref><ref>{{cite web|url=http://www.transtats.bts.gov/airports.asp?pn=1&Airport=ORD|title=Chicago, IL: O'Hare (ORD)|location=Washington|publisher=[[Bureau of Transportation Statistics]]|access-date=September 1, 2015|archive-url=https://web.archive.org/web/20141006081008/http://www.transtats.bts.gov/airports.asp?pn=1&Airport=ORD|archive-date=October 6, 2014|url-status=live}}</ref> as well as an operating base for [[Frontier Airlines]]<ref name="Frontier focus city">{{cite news|last=Harden|first=Mark|url=http://www.bizjournals.com/chicago/news/2014/09/30/frontier-airlines-making-chicagos-ohare-a-focus.html|title=Frontier Airlines making Chicago's O'Hare a focus|newspaper=[[Chicago Business Journal]]|publisher=[[American City Business Journals]]|location=Chicago|date=September 30, 2014|access-date=September 30, 2014|archive-url=https://web.archive.org/web/20141003034658/http://www.bizjournals.com/chicago/news/2014/09/30/frontier-airlines-making-chicagos-ohare-a-focus.html|archive-date=October 3, 2014|url-status=live}}</ref> and [[Spirit Airlines]].<ref name="Spirit focus city">{{cite news|last=Bhaskara|first=Vinay|url=http://airwaysnews.com/blog/2014/10/01/21577/|title=Spirit Airlines Adds Two New Routes at Chicago O'Hare|work=Airways News|date=October 1, 2014|access-date=October 1, 2014|url-status=dead|archive-url=https://web.archive.org/web/20141003024501/http://airwaysnews.com/blog/2014/10/01/21577/|archive-date=October 3, 2014}}</ref>

==History==
=== Establishment and defense efforts ===
{{See also|Illinois World War II Army Airfields}}
[[File:F4F-3WildcatOHareAirport-DLighting.jpg|thumb|[[Grumman F4F Wildcat|Grumman F4F-3 Wildcat]] on display in O'Hare's Terminal&nbsp;2, restored in the markings of [[Edward O'Hare|"Butch" O'Hare]]'s plane]]
Soon after the opening of [[Chicago Municipal Airport]] in 1926, the City of Chicago realized more airport capacity would be needed. The city government investigated various sites in the 1930s but made little progress before America's entry into [[World War II]].<ref name="airways1" />

O'Hare began as a manufacturing plant for [[Douglas C-54 Skymaster]]s during World War II and adjoining '''Douglas Field''' Airport.<ref>{{cite web | title=Orchard Place/Douglas Field | url=https://alcpress.org/military/afplants/orchard-place/index.html }}</ref> The site was originally known as a small German-American farming community known as [[Orchard Place, Illinois|Orchard Place]]. The {{convert|2|e6sqft|m2}} plant, in the northeast corner of what is now the airport, needed easy access to the workforce of Chicago—the nation's second-largest city at the time, as well as needing railroads and location far from enemy threat. 655 C-54s were built at the plant, more than half of all produced. The airfield, from which the C-54s flew out, was known as Douglas Airport; initially, it had four {{convert|5500|ft|m|adj = on}} runways.<ref name="airways1" /> This was also the location of the Army Air Force's 803rd Specialized Depot,<ref>{{cite web |title=The Early Years: Major Commands |url=https://secure.afa.org/Mitchell/reports/1206_60years.pdf |website=Air Force Association |access-date=August 31, 2018 |archive-url=https://web.archive.org/web/20190412100403/https://secure.afa.org/Mitchell/reports/1206_60years.pdf |archive-date=April 12, 2019 |url-status=live }}</ref> a unit charged with storing many captured enemy aircraft; a few representatives of this collection would eventually be transferred to the [[Smithsonian Institution]]'s [[National Air and Space Museum]].<ref>{{cite web|title=Messerschmitt Me 262 A-1a Schwalbe (Swallow)|url=https://airandspace.si.edu/collection-objects/messerschmitt-me-262-1a-schwalbe-swallow|website=Smithsonian: National Air & Space Museum|date=April 22, 2016 |publisher=Smithsonian Institution|access-date=May 24, 2018|archive-url=https://web.archive.org/web/20180612144432/https://airandspace.si.edu/collection-objects/messerschmitt-me-262-1a-schwalbe-swallow|archive-date=June 12, 2018|url-status=live}}</ref><ref>{{cite web|title=Junkers Ju 388 L-1|url=https://airandspace.si.edu/collection-objects/junkers-ju-388-l-1|website=Smithsonian: National Air & Space Museum|date=March 19, 2016 |publisher=Smithsonian Institution|access-date=May 24, 2018|archive-url=https://web.archive.org/web/20180612144444/https://airandspace.si.edu/collection-objects/junkers-ju-388-l-1|archive-date=June 12, 2018|url-status=live}}</ref>

Douglas Company's contract ended with the war's conclusion. Douglas considered building airliners at Orchard but chose to concentrate civil production at its headquarters in [[Santa Monica, California]].<ref name="airways1" /> With the departure of Douglas, the complex took the name '''Orchard (Douglas) Airport''', and was assigned the IATA code '''ORD'''. The only remaining building of the Douglas Aircraft Factory is the Administration building now used by the City of Chicago, Department of Aviation.<ref name="ORDCode">{{cite web|title=The Wacky Logic Behind Airport Codes|url=https://abcnews.go.com/Travel/history-airport-codes-logic-letter-codes/story?id=11684406|publisher=ABC.com|access-date=August 7, 2017|archive-url=https://web.archive.org/web/20170817100522/https://abcnews.go.com/Travel/history-airport-codes-logic-letter-codes/story?id=11684406|archive-date=August 17, 2017|url-status=live}}</ref>

The [[United States Air Force]] used the field extensively during the [[Korean War]]; the airport then had no scheduled airline service. Although not its primary base in the area, the Air Force used O'Hare as a fighter base; it was home to the [[62nd Fighter-Interceptor Squadron]] flying [[North American F-86 Sabre]]s from 1950 to 1959.<ref name="Air Force">{{cite web|title=62 Fighter Squadron (AETC)|url=https://www.dafhistory.af.mil/About-Us/Fact-Sheets/Display/Article/433226/62-fighter-squadron-aetc/|website=Air Force Historical Research Agency|publisher=United States Air Force|access-date=May 11, 2018|archive-url=https://web.archive.org/web/20180701194107/http://www.afhra.af.mil/About-Us/Fact-Sheets/Display/Article/433226/62-fighter-squadron-aetc/|archive-date=July 1, 2018|url-status=live}}</ref> By 1960, the need for O'Hare as an active duty fighter base was diminishing, just as commercial business was picking up at the airport. The Air Force removed active-duty units from O'Hare and turned the station over to [[Continental Air Command]], enabling them to base reserve and [[Air National Guard]] units there.<ref>{{cite web|title=ABSTRACT|url=http://airforcehistoryindex.org/data/000/462/865.xml|website=airforcehistoryindex.org|publisher=US Air Force|access-date=March 16, 2018|archive-url=https://web.archive.org/web/20110724231012/http://airforcehistoryindex.org/data/000/462/865.xml|archive-date=July 24, 2011|url-status=live}}</ref> As a result of a 1993 agreement between the City and the [[Department of Defense]], the reserve base was closed on April 1, 1997, ending its career as the home of the [[928th Airlift Wing]] and of the [[126th Air Refueling Wing]] in 1999. At that time, the remaining {{convert|357|acre|adj=on}} site came under the ownership of the Chicago Department of Aviation.<ref>{{cite web|title=1,000 Bid Farewell To O'hare's Air Force Reserve Base|url=https://www.chicagotribune.com/1997/03/24/1000-bid-farewell-to-ohares-air-force-reserve-base/|website=chicagotribune.com|date=March 24, 1997 |publisher=tronc|access-date=April 1, 2018|archive-url=https://web.archive.org/web/20180401212701/http://articles.chicagotribune.com/1997-03-24/news/9703240150_1_air-force-reservists-base-final-goodbye|archive-date=April 1, 2018|url-status=live}}</ref>

===Early commercial development===
In 1945, Chicago mayor [[Edward Joseph Kelly|Edward Kelly]] established a board to choose the site of a new airport to meet future demand. After considering various proposals, the board decided upon the Orchard Field site and acquired most of the federal government property in March 1946. The military retained a small parcel of property on the site and the right to use 25% of the airfield's operating capacity for free.<ref name="airways1" />

Ralph H. Burke devised an airport master plan based on the pioneering idea of what he called "split finger terminals", allowing a terminal building to be attached to "airline wings" (concourses), each providing space for gates and planes. (Pre-war airport designs had favored ever-larger single terminals, exemplified by [[Berlin]]'s [[Berlin Tempelhof Airport|Tempelhof]].) Burke's design also included underground refueling, direct highway access to the front of terminals, and direct rail access from downtown, all of which are utilized at airports worldwide today.<ref name="RHBEIoCOIA">{{cite web |last1=Burley |first1=Paul |title=Ralph H. Burke: Early Innovator of Chicago O'Hare International Airport |url=https://www.library.northwestern.edu/libraries-collections/transportation/collection/o-hare-at-50/research-materials/ralph-h-burke.html |website=library.northwestern.edu |publisher=Northwestern University |access-date=December 30, 2019 |archive-date=December 30, 2019 |archive-url=https://web.archive.org/web/20191230015426/https://www.library.northwestern.edu/libraries-collections/transportation/collection/o-hare-at-50/research-materials/ralph-h-burke.html |url-status=live }}</ref> O'Hare was the site of the world's first [[jet bridge]] in 1958,<ref>{{cite news |title=Briefings... |page=58 |url=https://books.google.com/books?id=CJ5OB0Vh8VUC&q=aero-gangplank&pg=PA94 |access-date=August 13, 2018 |work=Flying Magazine |agency=Google |volume=62 |issue=6 |publisher=Ziff-Davis Publishing |date=June 1, 1958 |archive-date=April 17, 2021 |archive-url=https://web.archive.org/web/20210417173334/https://books.google.com/books?id=CJ5OB0Vh8VUC&q=aero-gangplank&pg=PA94 |url-status=live }}</ref><ref>{{cite news |title=Airport's Mobile Covered Bridge |volume=44 |work=Life Magazine |issue=16 |publisher=Time-Life Publishing |date=April 21, 1958}}</ref> and successfully adapted [[slip forming|slip form paving]], developed for the nation's new [[Interstate highway system]], for seamless concrete runways.

In 1949, the City renamed the facility O'Hare Airport to honor [[Edward O'Hare|Edward "Butch" O'Hare]], the U.S. Navy's first [[flying ace]] and [[Medal of Honor]] recipient in [[World War II]].<ref>{{cite web|title=YESTERDAY'S CITY – Part III|url=http://polishnews.com/yesterday-s-city-part-iii|website=polishnews.com|date=January 16, 2013|publisher=MH Magazine|access-date=April 7, 2018|archive-url=https://web.archive.org/web/20180407183621/http://polishnews.com/yesterday-s-city-part-iii|archive-date=April 7, 2018|url-status=live}}</ref> However, its IATA code ('''ORD''') remained unchanged, resulting in O'Hare being one of the few IATA codes bearing no connection to the airport's name or metropolitan area.<ref name="ORDCode" />

===Arrival of passenger service and subsequent growth===
Scheduled passenger service began in 1955,<ref name="oharehistory">{{cite web |title=O'Hare History |url=http://www.flychicago.com/OHare/EN/AboutUs/History.aspx |website=Fly Chicago |publisher=Chicago Department of Aviation |access-date=September 1, 2015 |url-status=dead |archive-url=https://web.archive.org/web/20150924013918/http://www.flychicago.com/OHare/EN/AboutUs/History.aspx |archive-date=September 24, 2015 }}</ref> but growth was slow at first. Although Chicago had invested over $25&nbsp;million in O'Hare, [[Midway International Airport|Midway]] remained the world's busiest airport and airlines were reluctant to move until highway access and other improvements were completed.<ref>{{cite news |title=Airports for the Jet Age: The U.S. Is Far from Ready |url=http://www.time.com/time/magazine/article/0,9171,937983,00.html |work=Time Magazine |date=October 21, 1957 |access-date=July 15, 2012 |archive-url=https://web.archive.org/web/20120719235640/http://www.time.com/time/magazine/article/0,9171,937983,00.html |archive-date=July 19, 2012 |url-status=dead }}</ref> The April 1957 [[Official Airline Guide]] listed 36 weekday departures from O'Hare, while Midway had 414. Improvements began to attract the airlines: O'Hare's first international terminal opened in August 1958, and by April 1959 the airport had expanded to {{convert|7,200|acre|ha}} with new hangars, terminals, parking and other facilities. The [[Controlled-access highway|expressway]] link to downtown Chicago, now known as the [[Kennedy Expressway]], was completed in 1960.<ref name="oharehistory" /> New Terminals{{nbsp}}2 and{{nbsp}}3, designed by [[Charles Murphy (architect)|C. F. Murphy and Associates]], opened on January 1, 1962.<ref name="complex">{{cite news |date=April 2, 1959 |title=Break Ground at O'Hare for Terminal Unit |url=https://www.newspapers.com/article/chicago-tribune-break-ground-at-ohare-f/33775140/ |access-date=2025-03-29 |newspaper=[[Chicago Daily Tribune]] |pages=2 |via=[[Newspapers.com]]}}</ref>

The biggest factor driving airlines to relocate their operations from Midway to O'Hare was the jet airliner; the first scheduled jet at O'Hare was an American 707 from New York to Chicago to San Francisco on March 22, 1959.<ref>Chicago Tribune March 22, 1959, part 1 p3, March 23 part 3 p19</ref> One-mile-square (2.6-kilometer-square) Midway had no space for the runways that 707s and DC-8s required. Airlines had been reluctant to move to O'Hare, but they naturally did not want to split their operations: in July 1962, the last fixed-wing scheduled airline flight in Chicago moved from Midway to O'Hare. Until United returned in July 1964, Midway's only scheduled airline was Chicago Helicopter Airways. The arrival of Midway's traffic quickly made O'Hare the world's busiest airport, serving 10 million passengers annually. Within two years, that number would double, with Chicagoans boasting that more people passed through O'Hare in 12 months than [[Ellis Island]] had processed in its entire existence. O'Hare remained the world's busiest airport until it was eclipsed by [[Hartsfield-Jackson Atlanta International Airport]] in 1998.

O'Hare had four runways in 1955;<ref>{{cite book |url=https://babel.hathitrust.org/cgi/pt?id=uiug.30112033242345&view=1up&seq=18&skin=2021 |title=#18 Illinois airport directory |date=1956 |via=HathiTrust|publisher=Dept. of Transportation, Division of Aeronautics. }}</ref> {{convert|8000|foot|m}} runway 14R/32L opened in 1956 and was extended to {{convert|11600|ft|m}} a few years later, allowing nonstops to Europe. Runway 9R/27L (now 10L/28R) opened in 1968 and runway 4R/22L in 1971.

===Post-deregulation developments===
In the 1980s, after passage of [[Airline Deregulation Act|US airline deregulation]], the first major change at O'Hare occurred when [[TWA]] left Chicago for [[St. Louis Lambert International Airport|St. Louis]] as its main mid-continent hub.<ref>{{cite web |title=TWA Routes |url=http://airchive.com/html/timetable-and-route-maps/twa/1987-january-1/7236 |work=Airways News |date=January 1, 1987 |access-date=July 15, 2012 |archive-url=https://web.archive.org/web/20120320075618/http://airchive.com/html/timetable-and-route-maps/twa/1987-january-1/7236 |archive-date=March 20, 2012 |url-status=live }}</ref> Although TWA had a large hangar complex at O'Hare and had started [[Lockheed Super Constellation|Constellation]] nonstops to Paris in 1958, by the time of deregulation its operation was losing $25&nbsp;million a year under competition from United and American.<ref>{{cite news|title=THE AIRLINE BATTLE AT O'HARE|url=https://www.nytimes.com/1983/11/04/business/the-airline-battle-at-o-hare.html|website=[[The New York Times]]|date=November 4, 1983 |access-date=April 1, 2018|archive-url=https://web.archive.org/web/20180401212738/https://www.nytimes.com/1983/11/04/business/the-airline-battle-at-o-hare.html|archive-date=April 1, 2018|url-status=live}}</ref> [[Northwest Airlines|Northwest]] likewise ceded O'Hare to the competition and shifted to a [[Minneapolis-St. Paul International Airport|Minneapolis/St. Paul]] and [[Detroit Metropolitan Airport|Detroit]]-centered network by the early 1990s after acquiring [[Republic Airlines]] in 1986.<ref>{{cite web |title=North America Nonstop Routes |url=http://airchive.com/html/timetable-and-route-maps/northwest/1994-domestic-route-map/7021 |work=Airways News |year=1994 |access-date=July 15, 2012 |archive-url=https://web.archive.org/web/20120320075627/http://airchive.com/html/timetable-and-route-maps/northwest/1994-domestic-route-map/7021 |archive-date=March 20, 2012 |url-status=live }}</ref> [[Delta Air Lines|Delta]] maintained an O'Hare hub for some time, even commissioning a new Concourse{{nbsp}}L in 1983.<ref name="airways2">{{cite web|last1=Petchmo|first1=Ian|title=The Fascinating History Chicago's O'Hare International Airport: 1960–2000|url=https://airwaysmag.com/uncategorized/the-fascinating-history-chicagos-ohare-international-airport-1960-2000/|website=airwaysmag.com|date=April 14, 2014 |publisher=Airways International, Inc.|access-date=April 7, 2018|archive-url=https://web.archive.org/web/20180407182703/https://airwaysmag.com/uncategorized/the-fascinating-history-chicagos-ohare-international-airport-1960-2000/|archive-date=April 7, 2018|url-status=live}}</ref> Ultimately, Delta found competing from an inferior position at O'Hare too expensive and closed its Chicago hub in the 1990s, concentrating its upper Midwest operations at [[Cincinnati/Northern Kentucky International Airport|Cincinnati]].

[[File:United Airlines corridor, Chicago OHare Airport (6196116901).jpg|thumb|left|The Terminal 1 underground tunnel connects Concourses B and C.]]

The dominant hubs established at O'Hare in the 1980s by United and American continue to operate today. United developed a new two-concourse Terminal{{nbsp}}1 (dubbed "The Terminal for Tomorrow"), designed by [[Helmut Jahn]]. It was built between 1985 and 1987 on the site of the original Terminal{{nbsp}}1; the structure, which includes 50 gates, is best known for its curved glass forms and the connecting underground tunnel between Concourses{{nbsp}}B and{{nbsp}}C.<ref>{{cite news |title=United's Flashy Terminal Ready For Takeoff |first=Gary |last=Washburn |url=https://www.chicagotribune.com/1987/08/04/uniteds-flashy-terminal-ready-for-takeoff/ |newspaper=Chicago Tribune |date=August 4, 1987 |access-date=July 2, 2012 |archive-url=https://web.archive.org/web/20130315165728/http://articles.chicagotribune.com/1987-08-04/news/8702260809_1_walkway-concourse-neon |archive-date=March 15, 2013 |url-status=live }}</ref> The tunnel is illuminated with a neon installation titled ''Sky's the Limit'' (1987) by Canadian artist [[Michael Hayden (artist)|Michael Hayden]], which plays an airy, slow-tempo version of ''[[Rhapsody in Blue]]''.<ref>[https://reportedlost.com/chicago-ohare-international-airport/ Chicago O'Hare International Airport] {{Webarchive|url=https://web.archive.org/web/20200628010944/https://reportedlost.com/chicago-ohare-international-airport/ |date=June 28, 2020 }}. Reported Lost&Found. Retrieved June 24, 2020</ref> American renovated and expanded its existing facilities in Terminal{{nbsp}}3 from 1987 to 1990; those renovations feature a flag-lined entrance hall to Concourses{{nbsp}}H/K.<ref name="term3renov">{{cite book |last1=McGovern-Petersen |first1=Laurie |editor1-first=Alice |editor1-last=Sinkevitch |title=AIA Guide to Chicago |chapter=Chicago O'Hare International Airport |chapter-url={{google books|aQE21zTaju8C|page=278|plainurl=yes}} |edition=2nd |date=2004 |publisher=Harcourt |location=Orlando, Florida |isbn=0-15-602908-1 |page=278 |access-date=February 8, 2013}}</ref>

The demolition of the original Terminal 1 in 1984 to make way for Jahn's design forced a "temporary" relocation of international flights into facilities called "Terminal{{nbsp}}4" on the ground floor of the airport's central parking garage. International passengers were then transferred by bus to and from their aircraft. Relocation finally ended with the completion of the 21-gate International Terminal in 1993 (now called Terminal{{nbsp}}5); it contains all [[U.S. Customs and Border Protection|customs]] facilities. Its location, on the site of the original cargo area and east of the terminal core, necessitated the construction of [[O'Hare International Airport Transit System|a peoplemover]], which connected the terminal core with the new terminal as well as remote rental and parking lots.<ref name="airways2" />

Following deregulation and the buildup of the American and United hubs, O'Hare faced increasing delays from the late 1980s onward due to its inefficient runway layout; the airfield had remained unchanged since the addition of its last new runway (4R/22L) in 1971.<ref>Flightguide Vol. II, Revision 5/71, Airguide Publications/Monty Navarre, Monterrey CA</ref> O'Hare's three pairs of angled runways were meant to allow takeoffs into the wind, but they came at a cost: the various intersecting runways were both dangerous and inefficient. Official reports at the end of the 1990s ranked O'Hare as one of the worst-performing airports in the United States based on the percentage of delayed flights.<ref>{{cite web |title=Chicago, IL: Chicago O'Hare International (ORD) |url=http://www.transtats.bts.gov/airports.asp?pn=1&Airport=ORD&Airport_Name=Chicago,%20IL:%20O%20Hare&carrier=FACTS |publisher=Bureau of Transportation Statistics |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20120312030823/http://www.transtats.bts.gov/airports.asp?pn=1&Airport=ORD&Airport_Name=Chicago,%20IL:%20O%20Hare&carrier=FACTS |archive-date=March 12, 2012 |url-status=live }}</ref> In 2001, the Chicago Department of Aviation committed to an O'Hare Modernization Plan (OMP). Initially estimated at $6.6 billion, the OMP was to be paid by bonds issued against the increase in the federal [[passenger facility charge]] enacted that year and federal airport improvement funds.<ref>{{cite web|title=Lessons Learned From the Chicago O'Hare Modernization Program|url=https://www.enotrans.org/wp-content/uploads/2015/08/Chicago-paper.pdf?x43122|website=enotrans.com|publisher=Eno Center for Transportation|access-date=April 6, 2018|archive-date=May 1, 2021|archive-url=https://web.archive.org/web/20210501154819/https://www.enotrans.org/wp-content/uploads/2015/08/Chicago-paper.pdf?x43122|url-status=live}}</ref> The modernization plan was approved by the [[FAA]] in October 2005 and involved a complete reconfiguration of the airfield. The OMP included the construction of four new runways, lengthening two existing runways, and decommissioning three old runways to provide O'Hare with six parallel runways and two crosswind runways.<ref>{{cite web |last1=Hinz |first1=Greg |title=Here's how O'Hare's $8.5 billion makeover is moving along |url=https://www.chicagobusiness.com/greg-hinz-politics/heres-how-ohares-85-billion-makeover-moving-along |website=Crain's Chicago Business |date=September 25, 2019 |publisher=Crain Communications, Inc. |access-date=September 26, 2019 |archive-url=https://web.archive.org/web/20190926143835/https://www.chicagobusiness.com/greg-hinz-politics/heres-how-ohares-85-billion-makeover-moving-along |archive-date=September 26, 2019 |url-status=live }}</ref>

The OMP was the subject of legal battles, both with suburbs who feared the new layout's noise implications as well as with survivors of persons interred in a cemetery the city proposed to relocate; some of the cases were not resolved until 2011.<ref name="airways3">{{cite web|last1=Petchmo|first1=Ian|title=The Fascinating History Chicago's O'Hare International Airport: 2000 to Present|url=https://airwaysmag.com/uncategorized/the-fascinating-history-chicagos-ohare-international-airport-2000-to-present/|website=www.airwaysmag.com|date=April 21, 2014 |publisher=Airways International, Inc|access-date=May 10, 2018|archive-url=https://web.archive.org/web/20180510184104/https://airwaysmag.com/uncategorized/the-fascinating-history-chicagos-ohare-international-airport-2000-to-present/|archive-date=May 10, 2018|url-status=live}}</ref> These issues, plus the reduction in traffic as a result of the [[Great Recession]], delayed the OMP's completion; construction of the sixth and final parallel runway (9C/27C) began in 2016.<ref>{{cite web|title=Runway realignment at O'Hare (map)|url=http://www.chicagotribune.com/chi-getting-around-ohare-runway-gfx-20150720-htmlstory.html|website=chicagotribune.com|date=July 20, 2015 |publisher=Chicago Tribune|access-date=March 31, 2018|archive-url=https://web.archive.org/web/20180401075435/http://www.chicagotribune.com/chi-getting-around-ohare-runway-gfx-20150720-htmlstory.html|archive-date=April 1, 2018|url-status=live}}</ref> Its completion in 2020, along with an extension of runway 9R/27L completed in 2021, concluded the OMP.<ref name="OMPComplete">{{cite web |last1=Wessell |first1=Todd |title=$6 Billion, 16-Year O'Hare Modernization Project Ends Construction |date=September 10, 2021 |url=https://www.journal-topics.com/articles/6-billion-16-year-ohare-modernization-project-ends-construction/ |publisher=Journal & Topics |access-date=November 9, 2021 |archive-date=November 9, 2021 |archive-url=https://web.archive.org/web/20211109141327/https://www.journal-topics.com/articles/6-billion-16-year-ohare-modernization-project-ends-construction/ |url-status=live }}</ref>

===Expansion===
[[File:O'Hare_Control_Tower_2022.jpg|thumb|upright|Control tower and Terminals 3 and 2 seen from ATS (Airport Transit System)]]
In 2018, the city and airlines committed to Phase{{nbsp}}I of a new Terminal Area Plan dubbed O'Hare 21. The plan calls for two all-new satellite concourses to the southwest of Concourse C, and to expand Terminals 2 and 5 with additional gates, lounges, and updates to operations all over the airport. (Terminal 5 has ten new gates in addition to its newly expanded facilities, plus two additional gates to each accommodate an [[Airbus A380]].)<ref name="O'Hare21">{{cite news|last1=Spielman|first1=Fran|title=City Council approves $8.5&nbsp;billion O'Hare expansion plan by 40-to-1 vote|url=https://chicago.suntimes.com/chicago-politics/city-council-poised-to-approve-8-5-billion-ohare-expansion-plan/|newspaper=Chicago Sun-Times|location=Chicago|publisher=Chicago Public Media|access-date=April 1, 2018|archive-url=https://web.archive.org/web/20180401103403/https://chicago.suntimes.com/chicago-politics/city-council-poised-to-approve-8-5-billion-ohare-expansion-plan/|archive-date=April 1, 2018|url-status=dead}}</ref> The expansion will enable same-terminal transfers between international and domestic flights, faster connections, improved facilities and technology for [[TSA]] and [[U.S. Customs and Border Protection|customs]] inspections and much larger landside amenities such as shopping and restaurants. A principal feature of the plan is the reorganization of the terminal core into an "alliance hub," the first in North America; airside connections and layout will be optimized around [[airline alliances]]. This will be made possible by the construction of the '''O'Hare Global Terminal (OGT)''' where Terminal{{nbsp}}2 currently stands. The OGT and two new satellite concourses will allow for expansion for both American's and United's international operations as well as easy interchange with their respective [[Oneworld]] (American) and [[Star Alliance]] (United) partner carriers, eliminating the need to transfer to Terminal 5.

The project will add over {{convert|3|e6sqft|m2}} to the airport's terminals, add a new [[U.S. Customs and Border Protection|customs]] processing center in the OGT, reconstruct gates and concourses (new concourses will be a minimum of {{convert|150|ft|m}} wide), increase the gate count from 185 to 235, and provide 25% more ramp space at every gate throughout the airport to accommodate larger aircraft.<ref>{{cite news|last1=Ruthhart|last2=Byrne|first1=Bill|first2=John|date=March 29, 2018|title=$4&nbsp;billion bond approval earns Emanuel key victory as council green lights O'Hare overhaul|url=https://www.chicagotribune.com/2018/03/29/4-billion-bond-approval-earns-emanuel-key-victory-as-council-green-lights-ohare-overhaul/|newspaper=Chicago Tribune|publisher=Tribune Publishing|location=Chicago|access-date=April 1, 2018|archive-url=https://web.archive.org/web/20180401084025/http://www.chicagotribune.com/news/local/politics/ct-met-rahm-emanuel-ohare-airport-overhaul-city-council-20180328-story.html|archive-date=April 1, 2018|url-status=live}}</ref> After an international design competition that featured public voting on five final architectural proposals, the Studio ORD group, led by architect [[Jeanne Gang]] (in collaboration with SCB, [[Corgan (company)|Corgan]], Milhouse, and STL Architect), was selected to design the OGT,<ref>{{cite press release |title=City of Chicago Announces Selection of Studio ORD to Lead Historic O'Hare Expansion |url=https://www.flychicago.com/business/media/news/pages/article.aspx?newsid=1540 |website=O'Hare International Airport|location=Chicago |publisher=Chicago Department of Aviation |access-date=March 27, 2019 |archive-url=https://web.archive.org/web/20190327222020/https://www.flychicago.com/business/media/news/pages/article.aspx?newsid=1540 |archive-date=March 27, 2019 |url-status=live }}</ref><ref>{{cite web |title=Studio Gang to design Chicago O'Hare airport terminal |url=https://www.dezeen.com/2019/03/27/chicago-ohare-global-terminal-concourse-studio-ord-studio-gang/ |website=dezeen.com |date=March 27, 2019 |access-date=April 6, 2019 |archive-url=https://web.archive.org/web/20190331105350/https://www.dezeen.com/2019/03/27/chicago-ohare-global-terminal-concourse-studio-ord-studio-gang/ |archive-date=March 31, 2019 |url-status=live }}</ref> while [[Skidmore, Owings & Merrill LLP]] will design Satellites{{nbsp}}1 and{{nbsp}}2.<ref>{{cite web |title=City of Chicago Announces Selection of SOM, LLP To Design Two Satellite Concourses at O'Hare |url=https://www.flychicago.com/business/media/news/pages/article.aspx?newsid=1562 |website=flychicago.com |publisher=Chicago Department of Aviation |access-date=July 15, 2019 |archive-date=May 1, 2021 |archive-url=https://web.archive.org/web/20210501154819/https://www.flychicago.com/business/media/news/pages/article.aspx?newsid=1562 |url-status=live }}</ref> By terms of the agreement, total costs of $8.5&nbsp;billion for the project are to be borne by bonds issued by the city, which will be retired by airport usage fees paid by airlines. O'Hare 21 is scheduled for completion of the two satellite terminals in 2028, and overall completion in 2030.<ref>{{cite news|url=https://chicago.curbed.com/2019/1/17/18185431/ohare-design-competition-global-terminal|title=Here are the five designs competing for O'Hare's $8.5B expansion|first=Jay|last=Koziarz|date=January 17, 2019|work=Curbed Chicago|location=Chicago|publisher=Vox Media|access-date=October 1, 2020|archive-date=October 13, 2020|archive-url=https://web.archive.org/web/20201013110807/https://chicago.curbed.com/2019/1/17/18185431/ohare-design-competition-global-terminal|url-status=live}}</ref><ref>{{Cite news |last=Hinz |first=Greg |date=November 21, 2022 |title=Massive O'Hare project clears last hurdle |language=en-US |magazine=[[Crain's Chicago Business]] |publisher=[[Crain Communications]] |location=Chicago |url=https://www.chicagobusiness.com/politics/ohare-project-add-gates-redo-terminals-gets-faa-approval |url-access=subscription |access-date=December 1, 2022}}</ref>{{Update inline|date=December 2023|reason=This appears to no longer be on schedule.}}

By November 2023, the project's cost had ballooned far over budget, leading both American Airlines and United Airlines to call for the global terminal project to be cancelled or scaled back.<ref>{{Cite web |date=November 28, 2023 |title=As O'Hare expansion price tag climbs, airport's two biggest carriers want project scaled back – or grounded |url=https://chicago.suntimes.com/city-hall/2023/11/28/23979601/ohare-expansion-united-american-airlines-global-international-terminal-gates-flights-chicago |access-date=December 15, 2023 |website=Chicago Sun-Times |language=en}}</ref> On May 3, 2024, American Airlines and United Airlines were able to reach an agreement with the City of Chicago to allow the project to continue. In the agreement, the replacement of Terminal 2 would be accelerated, while the addition of Satellite 2 concourse would be delayed. The replacement of Terminal 2 with the OGT was deemed more critical to complete first instead of the Satellite 2 concourse.<ref>{{Cite news |date=May 3, 2024 |title=American, United reach agreement with City of Chicago on $8.5B O'Hare Airport overhaul |url=https://www.nbcchicago.com/news/local/chicago-ohare-airport-renovation-american-airlines-united-airlines/3428340/ |access-date=2024-06-28 |publisher=NBC Chicago |language=en-US}}</ref><ref name="Full Updated Timeline">{{Cite news |date=September 7, 2024 |title=Full Updated Timeline Revealed For O'Hare Expansion As City Begins Offering Bonds |url=https://chicagoyimby.com/2024/09/69654.html |access-date=2024-11-13 |language=en-US}}</ref> The design of Satellite 1 concourse was presented to the public on May 29, 2024, it was planned to complete Satellite 1 concourse by 2028.<ref name="designs for Satellite Concourse 1">{{Cite news |date=May 29, 2024 |title=O'Hare modernization: City unveils designs for Satellite Concourse 1 at O'Hare Global Terminal |url=https://abc7chicago.com/post/mayor-brandon-johnson-update-satellite-concourses-1-2/14882286/ |access-date=2024-11-13 |language=en-US}}</ref>

==Facilities==
[[File:Concourse at O'Hare International Airport near gates B11 and B12.jpg|thumb|United Airlines Terminal 1, Concourse B]]
[[File:Chicago Airport - ND0 5470.jpg|thumb|American Airlines Terminal 3 main hall]]

===Terminals===
O'Hare has four numbered passenger terminals with nine lettered concourses and a total of 215 gates, the most of any airport in the world.<ref name="ORDMap">{{cite web |title=Terminal Map |url=https://www.flychicago.com/ohare/map/Pages/default.aspx |website=O'Hare International Airport|publisher=Chicago Department of Aviation |location=Chicago|access-date=March 19, 2021 |archive-date=April 17, 2021 |archive-url=https://web.archive.org/web/20210417183655/https://www.flychicago.com/ohare/map/pages/default.aspx |url-status=live }}</ref>

*'''{{visible anchor|Terminal 1}}''' is used for [[United Airlines]], [[Lufthansa]] and [[All Nippon Airways]] flights. It has 52 gates on two concourses, lettered B and C.<ref name="ORDMap" />
*'''{{visible anchor|Terminal 2}}''' is used for most [[United Express]] and some United flights, as well as all [[Air Canada]] and [[JetBlue]] flights. It has 41 gates on two concourses, lettered E and F.<ref name="ORDMap" />
*'''{{visible anchor|Terminal 3}}''' is used for [[American Airlines]], [[Alaska Airlines]], [[Aer Lingus]], [[British Airways]], [[Iberia (airline)|Iberia]], [[Japan Airlines]], [[Spirit Airlines]], and some [[United Airlines]] flights. It has 80 gates on four concourses, lettered G, H, K, and L.<ref name="ORDMap" />
*'''{{visible anchor|Terminal 5}}''' is used for [[Delta Air Lines]], [[Frontier Airlines]] and [[Southwest Airlines]] flights, as well as all international airlines that do not depart from Terminals 1–3.<ref>{{cite press release | url=https://www.chicago.gov/city/en/depts/doa/provdrs/dbata/news/2022/april/april62022.html | title=Chicago Department of Aviation Completes First Phase of O'Hare Gate Renumbering at Terminal 5|publisher=Office of Emergency Management and Communications|location=Chicago}}</ref><ref>{{cite report|url=https://www.igcinc.org/wp-content/uploads/2021/09/ORD-Common-Use-Stand-Info-Mar-27-2022-thru-Oct-29-2022-DRAFT-2021-0907.pdf|title=ORD Common Gate Use Information|publisher=Chicago Department of Aviation|location=Chicago}}</ref> Terminal 5 is also used for non-[[United States border preclearance|precleared]] international arrivals, as it currently contains the airport's [[U.S. Customs and Border Protection]] facilities.<ref>{{cite web |title=International Traveler - O'Hare Airport |url=https://www.flychicago.com/ohare/myflight/international/pages/default.aspx |access-date=March 19, 2021 |archive-date=April 17, 2021 |archive-url=https://web.archive.org/web/20210417183650/https://www.flychicago.com/ohare/myflight/international/pages/default.aspx |url-status=live }}</ref> It has 35 non-sequential gates on a single concourse with the highest number being 40, lettered M. There are 3 gates in this terminal that can accommodate an Airbus A380, the largest commercial airplane in the world.<ref>{{Cite web |title=O'Hare Gate 380 Expansion |url=https://www.gregoryramon.com/commercial/ohare-gate-380-expansion |access-date=2025-03-07 |website=Gregory Ramon Design Studio |language=en-US}}</ref>

Terminals 1–3 are connected airside via a walkway.<ref name="ORDConnect">{{cite web |title=Connecting Traveler - O'Hare |url=https://www.flychicago.com/ohare/tofrom/connecting/pages/default.aspx |website=O'Hare International Airport |publisher=Chicago Department of Aviation|location=Chicago |access-date=March 11, 2023 |archive-date=March 6, 2023 |archive-url=https://web.archive.org/web/20230306061743/https://www.flychicago.com/ohare/tofrom/connecting/pages/default.aspx |url-status=live }}</ref> Terminal 5 is separated from the others by taxiways and does not have a walkway between it and Terminals 1–3; passengers transferring between Terminal 5 and the others can only do so landside via a shuttle bus or the [[Airport Transit System]], requiring rescreening at security, or via an airside shuttle bus that runs between Terminal 5 and Terminals 1 and 3 every 15 minutes from 11:30 am to 9:30 pm.<ref name="ORDConnect" />

===Runways===
O'Hare has two sets of parallel runways, one on either side of the terminal complex. Each airfield has three parallel east–west runways (9L/27R, 9C/27C, and 9R/27L on the north side; 10L/28R, 10C/28C, and 10R/28L on the south side) and a crosswind runway oriented northeast–southwest (4L/22R on the north, 4R/22L on the south). The north crosswind runway, 4L/22R, sees limited usage due to intersecting 9R/27L and 9C/27C;<ref>{{cite web|title=O'Hare Modernization Final Environmental Impact Statement, Appendix F, Table F-39|url=https://www.faa.gov/airports/airport_development/omp/eis/feis/Media/Appendix%20F/Appendix-F.pdf|website=faa.gov|publisher=Federal Aviation Administration|access-date=April 5, 2018|archive-url=https://web.archive.org/web/20180405153034/https://www.faa.gov/airports/airport_development/omp/eis/feis/Media/Appendix%20F/Appendix-F.pdf|archive-date=April 5, 2018|url-status=live}}</ref> however, runway 22L is often used for takeoffs during what is called "west flow" on the main runways. The airfield is managed by three [[FAA]] [[air traffic control]] towers. O'Hare has a voluntary nighttime (22:00–07:00) [[noise abatement]] program.<ref>{{cite web|title=Fly Quiet Program|url=http://www.flychicago.com/community/ORDnoise/FlyQuiet/Pages/default.aspx|website=flychicago.com|publisher=City of Chicago Department of Aviation|access-date=April 1, 2018|archive-url=https://web.archive.org/web/20180401213908/http://www.flychicago.com/community/ORDnoise/FlyQuiet/Pages/default.aspx|archive-date=April 1, 2018|url-status=live}}</ref>

In 2015, runway 32R/14L was permanently closed after 72 years of service, in favor of the new runway 10R/28L. In 2019, runway 32L/14R was also closed.<ref>{{cite web |url=https://worldwideaviation.solutions/blog/2015/8/20/runway-14l-32r-closed |title=Runway 14L/32R closed |publisher=worldwideaviation |date=August 20, 2015 |accessdate=December 8, 2023}}</ref>

Currently, O'Hare has the most runways of any civilian airport in the world, totaling eight.<ref>"FAA: Construction can start on new O'Hare terminals". (November 25, 2022). ''Hometown Register'', p.A2 col.2</ref>

===Hotel===
The Hilton Chicago O'Hare is between the terminal core and parking garage and is currently the only hotel on airport property. It is owned by the Chicago Department of Aviation and operated under an agreement with [[Hilton Hotels]], who extended their agreement with the city by ten years in 2018.<ref>{{cite web |last1=Hinz |first1=Greg |title=City inks new deal with Hilton to run upgraded O'Hare hotel |url=https://www.chicagobusiness.com/greg-hinz-politics/city-inks-new-deal-hilton-run-upgraded-ohare-hotel |website=chicagobusiness.com |date=October 30, 2018 |publisher=Crain Communications, Inc. |access-date=April 10, 2019 |archive-url=https://web.archive.org/web/20190407081705/https://www.chicagobusiness.com/greg-hinz-politics/city-inks-new-deal-hilton-run-upgraded-ohare-hotel |archive-date=April 7, 2019 |url-status=live }}</ref>

===Ground transportation===
The [[Airport Transit System]] shuttles passengers between the terminal core (Terminals 1–3), Terminal 5, and the O'Hare Multi-Modal Facility (MMF).<ref>{{cite web |title=Transportation Between Terminals |url=https://www.flychicago.com/ohare/ServicesAmenities/services/Pages/tbt.aspx |access-date=November 9, 2021 |archive-date=November 9, 2021 |archive-url=https://web.archive.org/web/20211109133511/https://www.flychicago.com/ohare/ServicesAmenities/services/Pages/tbt.aspx |url-status=live }}</ref> The system, which re-opened on November 3, 2021, resumed round-the-clock service starting at 5 a.m. on Monday, April 18, 2022,<ref>{{cite web|url=
https://www.chicago.gov/city/en/depts/doa/provdrs/dbata/news/2022/april/04142022.html | title=O'Hare Airport Transit System (ATS) Returns To 24-Hour Service - Chicago Department of Aviation | publisher=Chicago.gov
}}</ref> after a nearly six-year renovation.<ref>{{cite web |url=https://chicago.cbslocal.com/2021/11/02/ohare-people-mover-reopens-behind-schedule-over-budget/ |title=O'Hare People Mover To Start Running Again Wednesday, Years Behind Schedule And Millions Over Budget – CBS Chicago |publisher=Chicago.cbslocal.com |date=November 2, 2021 |access-date=January 12, 2022 |archive-date=November 9, 2021 |archive-url=https://web.archive.org/web/20211109041645/https://chicago.cbslocal.com/2021/11/02/ohare-people-mover-reopens-behind-schedule-over-budget/ |url-status=live }}</ref> Meanwhile, free shuttle buses also continue to run 24/7 and contribute to congestion, boarding on the upper (departures) level of all terminals. The Bus Shuttle center, located on the ground level of the parking garage between Terminals 1–3 and directly opposite the Hilton Hotel, provides a temporary boarding location for local hotel shuttles and regional public transport buses.<ref name="MMF">{{cite web |title=Multi-Modal Facility |url=https://www.flychicago.com/ohare/tofrom/MultimodalFacility/pages/default.aspx |website=flychicago.com |publisher=Chicago Department of Aviation |access-date=March 9, 2019 |archive-url=https://web.archive.org/web/20181120095347/https://www.flychicago.com/ohare/tofrom/MultimodalFacility/Pages/default.aspx |archive-date=November 20, 2018 |url-status=live }}</ref> The O'Hare Multi-Modal Facility is the home of all on-airport car rental firms as well as some extended parking.<ref name="MMF"/> In addition, the Chicago-area commuter rail system, [[Metra]], has a [[O'Hare Transfer station|transfer station]] of its [[North Central Service]] (NCS) located at the northeast corner of the MMF; however, the NCS currently operates an occasional schedule on weekdays only.<ref>{{cite web |title=Maps and Schedules - NCS |url=https://metrarail.com/maps-schedules/train-lines/NCS |website=metrarail.com |publisher=Commuter Rail Division of the Regional Transportation Authority |access-date=July 15, 2019 |archive-url=https://web.archive.org/web/20190419111926/https://metrarail.com/maps-schedules/train-lines/NCS |archive-date=April 19, 2019 |url-status=live }}</ref>

The [[Chicago Transit Authority|CTA]] [[Blue Line (CTA)|Blue Line]]'s north terminus is at {{cta|O'Hare}} and provides direct service to downtown via the [[Milwaukee–Dearborn subway]] in [[The Loop (CTA)|the Loop]] and continuing to west suburban [[Forest Park, Illinois|Forest Park]]. Trains depart at intervals ranging from every four to thirty minutes, 24 hours a day.<ref>{{cite web |title=Blue Line 'L' |url=https://www.transitchicago.com/assets/1/6/rail-tt_blue.pdf |website=transitchicago.com |publisher=Chicago Transit Authority |access-date=January 25, 2020 |archive-date=October 25, 2018 |archive-url=https://web.archive.org/web/20181025150111/https://www.transitchicago.com/assets/1/6/rail-tt_blue.pdf |url-status=live }}</ref> The station is located on the lower level of the parking garage, and can be accessed directly from Terminals{{nbsp}}1–3 via tunnel and from Terminal{{nbsp}}5 via shuttle bus.

[[Pace (transit)|Pace]], [[Peoria Charter]], [[Van Galder Bus Company]], and [[Wisconsin Coach Lines]] operate bus service to O'Hare, stopping at the MMF.

===Airline shuttle buses===
{| class="wikitable"
! {{bus icon}} Operator !! Destinations !! Refs
|-
| [[American Airlines]] (operated by Landline)||[[Chicago Rockford International Airport|Chicago/Rockford]], [[South Bend International Airport|South Bend]]<ref>{{Cite web |date=2025-07-21 |title=American Airlines Expands Regional Connectivity with New Motorcoach Service from Rockford and South Bend to Chicago O’Hare: You Need to Know - Travel And Tour World |url=https://www.travelandtourworld.com/news/article/american-airlines-expands-regional-connectivity-with-new-motorcoach-service-from-rockford-and-south-bend-to-chicago-ohare-you-need-to-know/ |access-date=2025-07-21 |language=en-US}}</ref> ||<ref>[https://www.aa.com/i18n/travel-info/experience/landline.jsp Trip connections with Landline]</ref>
|}
American Airlines offers "[[Airport apron|tarmac]]-to-tarmac" bus service between O'Hare and several airports within close proximity, which are considered too close for flights to be economically feasible. This is designed to facilitate connections through O'Hare, a major [[Airline hub|international hub]] for American Airlines. Passengers check their bags and clear security at their respective airport, and board a [[Coach (bus)|motorcoach]] that takes them directly to a gate past security at O'Hare. The service is operated by the Landline Company, and is booked through the regular American Airlines reservation system.

O'Hare is directly served by [[Interstate 190 (Illinois)|Interstate 190]], which offers interchanges with Mannheim Road ([[U.S. Route 12 (Illinois)|U.S. 12]] and [[U.S. Route 45 (Illinois)|45]]), the Tri-State Tollway ([[Interstate 294]]), and [[Interstate 90 (Illinois)|Interstate 90]]. I-90 continues as the Kennedy Expressway into downtown Chicago and becomes the Jane Addams Memorial Tollway northwest to Rockford and the Wisconsin state line.

===Cargo facilities===
There are presently two main cargo areas at O'Hare. The South Cargo Area was relocated in the 1980s from the airport's first air cargo facilities, located east of the terminal core, where Terminal{{nbsp}}5 now stands. Many of the structures in this new cargo area then had to be rebuilt, again, to allow for the OMP and specifically runway 10R/28L; as a result, what is now called the South Cargo Area is located between 10R/28L and 10C/28C. This large collection of facilities, in three sections (Southwest, South Central, and Southeast), was established mainly by traditional airline-based air cargo; [[Air France Cargo]], American, [[JAL Cargo]], [[KLM]], [[Lufthansa Cargo]], Northwest and United all built purpose-built, freestanding cargo facilities,<ref name="manual">{{cite web|title=Chicago O'Hare International Airport: Advanced Airfield Familiarization Manual|url=http://app.flychicago.com/badging/advanced_airfield_familiarization_9.2016.pdf|website=flychicago.com|publisher=Chicago Department of Aviation|access-date=April 2, 2018|archive-url=https://web.archive.org/web/20180402163510/http://app.flychicago.com/badging/advanced_airfield_familiarization_9.2016.pdf|archive-date=April 2, 2018|url-status=live}}</ref> although some of these are now leased out to dedicated cargo firms. In addition, the area contains two separate facilities for shipper [[FedEx]] and one for [[United Parcel Service|UPS]].<ref name="manual" />

The Northeast Cargo Area (NEC) is a conversion of the former military base (the Douglas plant area) at the northeast corner of the airport property. It is a new facility designed to increase O'Hare's cargo capacity by 50%. Two buildings currently make up the NEC: a {{convert|540000|sqft|m2}} building completed in 2016,<ref>{{cite web |last=Desormeaux |first=Hailey |url=https://www.americanshipper.com/main/news/ohare-opens-new-cargo-center-66358.aspx |title=O'Hare opens new cargo center &#124; News |publisher=American Shipper |date=December 22, 2016 |access-date=March 16, 2018 |archive-url=https://web.archive.org/web/20171222051329/https://www.americanshipper.com/main/news/ohare-opens-new-cargo-center-66358.aspx |archive-date=December 22, 2017 |url-status=live }}</ref> and a {{convert|240000|sqft|m2}} building that was completed in 2017.<ref>{{cite web |author=DVV Media Group GmbH |url=http://www.aircargonews.net/news/airport/single-view/news/chicago-opens-second-phase-of-cargo-expansion.html |title=Chicago opens second phase of cargo expansion ǀ Air Cargo News |date=August 22, 2017 |publisher=Aircargonews.net |access-date=March 16, 2018 |archive-url=https://web.archive.org/web/20171222052920/http://www.aircargonews.net/news/airport/single-view/news/chicago-opens-second-phase-of-cargo-expansion.html |archive-date=December 22, 2017 |url-status=live }}</ref> A third structure will complete the NEC with another {{convert|150000|sqft|m2}} of warehouse space.<ref>{{cite web|last1=Burns|first1=Justin|title=Chicago O'Hare opens second phase of new cargo facility|url=https://www.aircargoweek.com/chicago-ohare-opens-phase-cargo-facility/|website=aircargoweek.com|date=August 23, 2017|publisher=Azura International|access-date=April 2, 2018|archive-url=https://web.archive.org/web/20180402102248/https://www.aircargoweek.com/chicago-ohare-opens-phase-cargo-facility/|archive-date=April 2, 2018|url-status=live}}</ref>

The current capability of the cargo areas provide {{convert|2|e6sqft|m2}} of airside cargo space with parking for 40 wide-body freighters matched with over {{convert|2|e6sqft|m2}} of landside warehousing capability. O'Hare shipped over {{convert|1700000|t|short ton|abbr=off}} in 2018, [[List of busiest airports by cargo traffic|fifth]] among airports in the U.S.<ref>{{cite web |title=Year-To-Date Operations, Passengers, Cargo Summary By Class; As of December 2018; O'Hare International Airport |url=https://www.flychicago.com/business/CDA/factsfigures/Pages/airtraffic.aspx |website=flychicago.com |publisher=Chicago Department of Aviation |access-date=July 15, 2019 |archive-url=https://web.archive.org/web/20190914012140/https://www.flychicago.com/business/CDA/factsfigures/Pages/airtraffic.aspx |archive-date=September 14, 2019 |url-status=live }} (Select: O'Hare / 2081 / December)</ref>

===Other facilities===
In 2011, O'Hare became the first major airport to build an [[apiary]] on its property; every summer, it hosts as many as 75 hives and a million bees. The bees are maintained by 30 to 40 ex-offenders with little to no work experience and few marketable skills; they are primarily recruited from Chicago's [[North Lawndale]] neighborhood. They are taught beekeeping but also benefit from the bees' labor, turning it into bottled fresh honey, soaps, lip balms, candles and moisturizers marketed under the ''[https://beelovebuzz.com/ beelove]'' product line.<ref>{{cite web |title=beelove link |url=https://beelovebuzz.com/ |website=beelove |publisher=Sweet Beginnings, LLC |access-date=July 15, 2019 |archive-url=https://web.archive.org/web/20190715012727/https://beelovebuzz.com/ |archive-date=July 15, 2019 |url-status=live }}</ref><ref>{{cite web|last1=Baskas|first1=Harriet|title=Bee colonies take flight once more, with some help from airport apiaries|url=https://www.cnbc.com/2017/08/04/bee-colonies-take-flight-once-more-with-some-help-from-airport-apiaries.html|website=cnbc.com|date=August 6, 2017|publisher=CNBC, LLC|access-date=April 2, 2018|archive-url=https://web.archive.org/web/20180402163501/https://www.cnbc.com/2017/08/04/bee-colonies-take-flight-once-more-with-some-help-from-airport-apiaries.html|archive-date=April 2, 2018|url-status=live}}</ref> More than 500 persons have completed the program, transferring to jobs in manufacturing, food processing, customer service, and hospitality; the repeat-offender rate is reported to be less than 10%.<ref>{{cite web|title=Apiary: The First Major On-Airport Apiary in the U.S.|url=http://www.flychicago.com/community/environment/apiary/pages/default.aspx|website=flychicago.com|publisher=Chicago Department of Aviation|access-date=April 2, 2018|archive-url=https://web.archive.org/web/20180402163336/http://www.flychicago.com/community/environment/apiary/pages/default.aspx|archive-date=April 2, 2018|url-status=live}}</ref>

The CDA's Airport Airfield Operations section is based out of the {{cvt|150|ft|-1}} tall prototype tower architect I.M. Pei designed for the FAA in the 1960s-1970s.

Resthaven Cemetery, which predates the airport, is situated across from the FedEx facility. Over 300 people are interred at Resthaven, which was allowed to remain on the airport grounds post-OMP while another cemetery, St. Johannes, had to be relocated.<ref>{{Cite web |last=Meriwether|first=Andrew |date=2025-03-12 |title= Why is there a cemetery at O'Hare Airport? |url= https://www.wbez.org/curious-city/2025/03/12/why-is-there-a-cemetery-at-ohare-airport |access-date=2025-03-13 |website=WBEZ |language=en-US}}</ref>

==Airlines and destinations==
===Passenger===
<!--DO NOT ADD OR REMOVE ROUTES WITHOUT GIVING A VALID INDEPENDENT SOURCE. EXACT DATES ARE MANDATORY FOR NEW ROUTES TO BE ADDED HERE. ALSO, ADD INLINE CITATIONS IF POSSIBLE.-->
{{Airport destination list | 3rdcoltitle = Refs | 3rdcolunsortable=yes
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| [[Aer Lingus]] | [[Dublin Airport|Dublin]] | <ref>{{cite web|url=https://www.aerlingus.com/html/flights-time-table.html|title=Timetables|publisher=Aer Lingus|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170219100623/https://www.aerlingus.com/html/flights-time-table.html|archive-date=February 19, 2017|url-status=live}}</ref>
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| [[Aeroméxico]] | [[Guadalajara International Airport|Guadalajara]], [[Mexico City International Airport|Mexico City]] | <ref>{{cite web|url=https://booking.aeromexico.com/SSW2010/D5DE/flightSchedulePage.html|title=Timetables|publisher=Aeroméxico|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20181119011305/https://booking.aeromexico.com/SSW2010/D5DE/flightSchedulePage.html|archive-date=November 19, 2018|url-status=live}}</ref>
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| [[Air Canada]] | [[Montréal–Trudeau International Airport|Montréal–Trudeau]],<ref>{{OAGWorldJuly2025Ref|title=Montreal, QC, Canada YMQ|pages=768-771}}</ref> [[Toronto Pearson International Airport|Toronto–Pearson]],<ref>{{OAGWorldJuly2025Ref|title=Toronto, ON, Canada YTO|pages=1156-1162}}</ref> [[Vancouver International Airport|Vancouver]]<ref>{{OAGWorldJuly2025Ref|title=Vancouver, BC, Canada YVR|pages=1184-1188}}</ref> | <ref name="AC01">{{cite web|url=https://www.aircanada.com/ca/en/aco/home/book/routes-and-partners/flight-schedules.html|title=Flight Schedules|publisher=Air Canada|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180323072516/https://www.aircanada.com/ca/en/aco/home/book/routes-and-partners/flight-schedules.html|archive-date=March 23, 2018|url-status=live}}</ref>
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| [[Air Canada Express]] | [[Montréal–Trudeau International Airport|Montréal–Trudeau]],<ref>{{OAGWorldJuly2025Ref|title=Montreal, QC, Canada YMQ|pages=768-771}}</ref> [[Billy Bishop Toronto City Airport|Toronto–Billy Bishop]] (begins June 1, 2026),<ref name="AC expansion">{{cite web |first=Lucas |last=Casaletto |url=https://toronto.citynews.ca/2025/10/23/air-canada-toronto-billy-bishop-airport-flights-us/ |title=Air Canada announces major Billy Bishop expansion in Toronto with new U.S. routes |date=2025-10-23 |publisher=City News}}</ref> [[Toronto Pearson International Airport|Toronto–Pearson]]<ref>{{OAGWorldJuly2025Ref|title=Toronto, ON, Canada YTO|pages=1156-1162}}</ref> | <ref name="AC02">{{cite web|url=https://www.aircanada.com/ca/en/aco/home/book/routes-and-partners/flight-schedules.html|title=Flight Schedules|publisher=Air Canada|access-date=Feb 10, 2025}}</ref>
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| [[Air France]] | [[Charles de Gaulle Airport|Paris–Charles de Gaulle]] | <ref>{{cite web|url=http://www.airfrance.ca/CA/en/local/resainfovol/horaires/horaires.do|title=Air France flight schedule|publisher=Air France|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20171116223753/https://www.airfrance.ca/CA/en/local/resainfovol/horaires/horaires.do|archive-date=November 16, 2017|url-status=live}}</ref>
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| [[Air India]] | [[Indira Gandhi International Airport|Delhi]] | <ref>{{cite web|url=https://aviationsourcenews.com/airline/usa-bound-air-india-continues-its-march-of-progress/|title=USA-bound: Air India continues its march of progress|publisher=Aviation Source News|date=February 29, 2024|accessdate=April 15, 2024|archive-date=April 21, 2024|archive-url=https://web.archive.org/web/20240421215359/https://aviationsourcenews.com/airline/usa-bound-air-india-continues-its-march-of-progress/|url-status=dead}}</ref>
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| [[Air Serbia]] | [[Belgrade Nikola Tesla Airport|Belgrade]] | <ref>{{cite web | url=https://www.exyuaviation.com/2022/11/air-serbia-schedules-chicago-launch.html | title=Air Serbia schedules Chicago launch | date=November 17, 2022 }}</ref>
<!-- -->
| [[Alaska Airlines]] | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Portland International Airport|Portland (OR)]], [[San Diego International Airport|San Diego]],<ref>{{cite web |title=Alaska Airlines Fall 2025 Network Adjustments |url=https://www.aeroroutes.com/eng/250422-asfall25 |website=Aeroroutes |access-date=22 April 2025}}</ref> [[Seattle–Tacoma International Airport|Seattle/Tacoma]] | <ref name="AlaskaRoutes">{{cite news|title=Flight Timetable|newspaper=Alaska Airlines|url=https://www.alaskaair.com/content/travel-info/timetables.aspx|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170202123138/https://www.alaskaair.com/content/travel-info/timetables.aspx|archive-date=February 2, 2017|url-status=live|last1=Airlines|first1=Alaska}}</ref><ref>{{cite web |url=https://ancairport.com/flights/destinations/ |access-date=February 20, 2023 |title=Destinations |website=Ted Stevens Anchorage International Airport |archive-url=https://web.archive.org/web/20230131124443/https://ancairport.com/flights/destinations/ |archive-date=January 31, 2023 |url-status=live}}</ref>
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| [[All Nippon Airways]] | [[Haneda Airport|Tokyo–Haneda]], [[Narita International Airport|Tokyo–Narita]] | <ref>{{cite web|title=Timetables [International Routes]|url=https://www.ana.co.jp/en/us/book-plan/airinfo/timetable/international/|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180624092943/https://www.ana.co.jp/en/us/book-plan/airinfo/timetable/international/|archive-date=June 24, 2018|url-status=live}}</ref>
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| [[American Airlines]] | [[Albuquerque International Sunport|Albuquerque]], [[Hartsfield–Jackson Atlanta International Airport|Atlanta]], [[Austin–Bergstrom International Airport|Austin]], [[Logan International Airport|Boston]], [[Cancún International Airport|Cancún]], [[Charlotte Douglas International Airport|Charlotte]], [[Cleveland Hopkins International Airport|Cleveland]], [[Dallas Fort Worth International Airport|Dallas/Fort Worth]], [[Denver International Airport|Denver]], [[Fort Lauderdale–Hollywood International Airport|Fort Lauderdale]], [[Southwest Florida International Airport|Fort Myers]], [[Gerald R. Ford International Airport|Grand Rapids]], [[Bradley International Airport|Hartford]], [[Daniel K. Inouye International Airport|Honolulu]],<ref>{{cite web |title=American to Resume Its Longest Domestic Route |url=https://www.airwaysmag.com/new-post/american-resume-longest-domestic |website=Airways |access-date=21 February 2025}}</ref> [[George Bush Intercontinental Airport|Houston–Intercontinental]], [[Indianapolis International Airport|Indianapolis]], [[Kansas City International Airport|Kansas City]], [[Harry Reid International Airport|Las Vegas]], [[Heathrow Airport|London–Heathrow]], [[Los Angeles International Airport|Los Angeles]], [[Mexico City International Airport|Mexico City]],<ref name=AmericanMexicoExpansion>{{Cite web |title=American Airlines To Join Competition On Chicago O’Hare-Mexico City Route {{!}} Aviation Week Network |url=https://aviationweek.com/air-transport/airports-networks/american-airlines-join-competition-chicago-ohare-mexico-city-route |access-date=2025-07-11 |website=aviationweek.com}}</ref> [[Miami International Airport|Miami]], [[Minneapolis–Saint Paul International Airport|Minneapolis/St. Paul]], [[Sangster International Airport|Montego Bay]], [[Louis Armstrong New Orleans International Airport|New Orleans]], [[John F. Kennedy International Airport|New York–JFK]], [[LaGuardia Airport|New York–LaGuardia]], [[Newark Liberty International Airport|Newark]], [[John Wayne Airport|Orange County (CA)]], [[Orlando International Airport|Orlando]], [[Philadelphia International Airport|Philadelphia]], [[Phoenix Sky Harbor International Airport|Phoenix–Sky Harbor]], [[Portland International Airport|Portland (OR)]], [[Punta Cana International Airport|Punta Cana]], [[Raleigh–Durham International Airport|Raleigh/Durham]], [[St. Louis Lambert International Airport|St. Louis]], [[Salt Lake City International Airport|Salt Lake City]], [[San Antonio International Airport|San Antonio]], [[San Diego International Airport|San Diego]], [[San Francisco International Airport|San Francisco]], [[Los Cabos International Airport|San José del Cabo]], [[Luis Muñoz Marín International Airport|San Juan]], [[Seattle–Tacoma International Airport|Seattle/Tacoma]], [[Spokane International Airport|Spokane]],<ref>{{cite web|url=https://www.kxly.com/news/lilac-to-windy-spokane-airport-to-have-daily-direct-flights-to-chicago/article_12c7663a-bbf6-11ef-9de6-2761c8457ef6.html|title=Lilac to Windy City: Spokane Airport to have daily, direct flights to Chicago|publisher=KXLY|date=December 16, 2024|accessdate=February 22, 2025}}</ref> [[Tampa International Airport|Tampa]], [[Tucson International Airport|Tucson]], [[Ronald Reagan Washington National Airport|Washington–National]], [[Palm Beach International Airport|West Palm Beach]]<br />'''Seasonal:''' [[Ted Stevens Anchorage International Airport|Anchorage]],<ref>{{cite web|url=https://www.aeroroutes.com/eng/241108-aa3q25ordanc|title=American Airlines 3Q25 Chicago - Anchorage Aircraft Changes|publisher=AeroRoutes|date=November 8, 2024|accessdate=November 14, 2024}}</ref> [[Queen Beatrix International Airport|Aruba]],{{cn|date=May 2025}} [[Athens International Airport|Athens]],<ref name="auto">{{cite web |title=American Airlines More International Schedule Changes for Summer 2025 |date=February 2025 |url=https://aviationa2z.com/index.php/2025/02/01/american-airlines-international-schedule-changes-for-summer-2025/}}</ref> [[Baltimore/Washington International Airport|Baltimore]],{{cn|date=May 2025}} [[Josep Tarradellas Barcelona–El Prat Airport|Barcelona]],<ref name="auto"/> [[Boise Airport|Boise]],<ref name="AAA319">{{cite web|url=https://www.aeroroutes.com/eng/250617-aa2h25319|title=American A319 2H25 Network Additions – 15JUN25|publisher=Aeroroutes|date=June 17, 2025|accessdate=June 6, 2025}}</ref> [[Bozeman Yellowstone International Airport|Bozeman]],{{cn|date=May 2025}} [[Buffalo Niagara International Airport|Buffalo]],{{cn|date=May 2025}} [[Calgary International Airport|Calgary]],{{cn|date=May 2025}} [[Charleston International Airport|Charleston (SC)]],{{cn|date=May 2025}} [[Cincinnati/Northern Kentucky International Airport|Cincinnati]],<ref name="AAA319" /> [[Cozumel International Airport|Cozumel]],{{cn|date=May 2025}} [[Curaçao International Airport|Curaçao]] (begins December 6, 2025),<ref name=AAORDNew25 /> [[Des Moines International Airport|Des Moines]], [[Destin–Fort Walton Beach Airport|Destin/Fort Walton Beach]],{{cn|date=May 2025}} [[Detroit Metropolitan Airport|Detroit]],{{cn|date=May 2025}} [[Dublin Airport|Dublin]],<ref name="auto"/> [[Eagle County Regional Airport|Eagle/Vail]],{{cn|date=May 2025}} [[Glacier Park International Airport|Glacier Park/Kalispell]],{{cn|date=May 2025}} [[Owen Roberts International Airport|Grand Cayman]],{{cn|date=May 2025}} [[La Aurora International Airport|Guatemala City]],<ref name=AAORDNew25 /> [[Jackson Hole Airport|Jackson Hole]],{{cn|date=May 2025}} [[Jacksonville International Airport|Jacksonville (FL)]],{{cn|date=May 2025}} [[Guanacaste Airport|Liberia (CR)]],{{cn|date=May 2025}} [[Madrid–Barajas Airport|Madrid]],<ref name=AASum25>{{cite web|url=https://www.travelandleisure.com/chicago-philadelphia-and-charlotte-are-all-getting-new-flights-to-europe-on-american-airlines-8706828|title=American Airlines Is Adding 5 New Routes to Europe — See Where|website=Travel+Leisure|date=September 5, 2024|accessdate=September 5, 2024}}</ref> [[Memphis International Airport|Memphis]],<ref name="AAA319" /> [[Naples International Airport|Naples]],<ref>{{cite web |title=American Airlines NS25 Intercontinental Network Changes – 03NOV24 |url=https://www.aeroroutes.com/eng/241104-aans25inc |website=Aeroroutes |access-date=4 November 2024}}</ref> [[Nashville International Airport|Nashville]],{{cn|date=May 2025}} [[Lynden Pindling International Airport|Nassau]],{{cn|date=May 2025}} [[Eppley Airfield|Omaha]],{{cn|date=May 2025}} [[Palm Springs International Airport|Palm Springs]],{{cn|date=May 2025}} [[Charles de Gaulle Airport|Paris–Charles de Gaulle]],<ref>{{cite web |title=American Airlines NS25 Intercontinental Network Changes – 03NOV24 |url=https://www.aeroroutes.com/eng/241104-aans25inc |website=Aeroroutes |access-date=5 August 2025}}</ref> [[Pittsburgh International Airport|Pittsburgh]],{{cn|date=May 2025}} [[Rhode Island T. F. Green International Airport|Providence]],{{cn|date=May 2025}} [[Providenciales International Airport|Providenciales]],{{cn|date=May 2025}} [[Licenciado Gustavo Díaz Ordaz International Airport|Puerto Vallarta]],{{cn|date=May 2025}} [[Querétaro Intercontinental Airport|Querétaro]] (begins December 12, 2025),<ref name=AmericanMexicoExpansion/> [[Rome Fiumicino Airport|Rome–Fiumicino]],{{cn|date=May 2025}} [[Sacramento International Airport|Sacramento]], [[Henry E. Rohlsen Airport|St. Croix]] (begins December 6, 2025),<ref name=AAORDNew25 /> [[Princess Juliana International Airport|St. Maarten]],<ref name=AAORDNew25 /> [[Cyril E. King Airport|St. Thomas]],{{cn|date=May 2025}} [[Juan Santamaría International Airport|San José (CR)]],<ref name=AAORDNew25 /> [[Sarasota–Bradenton International Airport|Sarasota]],{{cn|date=May 2025}} [[Savannah/Hilton Head International Airport|Savannah]],{{cn|date=May 2025}} [[Vancouver International Airport|Vancouver]]{{cn|date=May 2025}} | <ref name="AmericanRoutes">{{cite web|title=Flight schedules and notifications|url=https://www.aa.com/travelInformation/flights/schedule|access-date=December 17, 2024|archive-url=https://web.archive.org/web/20170202010611/https://www.aa.com/travelInformation/flights/schedule|archive-date=February 2, 2017|url-status=live}}</ref>
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| [[American Eagle (airline brand)|American Eagle]] | [[Akron–Canton Airport|Akron/Canton]],<ref name=AAORDNew25>{{cite web|url=https://www.travelandtourworld.com/news/article/united-states-costa-rica-guatemala-new-american-airlines-expansion-at-chicago-ohare-enhances-international-tourism-connections/|title=United States, Costa Rica, Guatemala: New American Airlines Expansion at Chicago O'Hare Enhances International Tourism Connections|website=Travel and Tour World|date=May 2, 2025|accessdate=May 3, 2025}}</ref>  [[Albany International Airport|Albany]], [[Appleton International Airport|Appleton]], [[Asheville Regional Airport|Asheville]], [[Aspen/Pitkin County Airport|Aspen]], [[Hartsfield–Jackson Atlanta International Airport|Atlanta]], [[Austin–Bergstrom International Airport|Austin]], [[Baltimore/Washington International Airport|Baltimore]], [[Bangor International Airport|Bangor]], [[Birmingham–Shuttlesworth International Airport|Birmingham (AL)]], [[Bismarck Municipal Airport|Bismarck]],<ref name="A to Z"/> [[Central Illinois Regional Airport|Bloomington/Normal]], [[Boise Airport|Boise]],<ref>{{Cite web |last=Velani |first=Bhavya |date=2024-11-23 |title=American Airlines Adds Three and Cuts Six Routes While United Adds 3 and Drops 4 |url=https://aviationa2z.com/index.php/2024/11/23/american-airlines-united-drops-three-new-routes/ |access-date=2024-11-25 |website=Aviation A2Z |language=en-US}}</ref> [[Logan International Airport|Boston]], [[Buffalo Niagara International Airport|Buffalo]], [[Eastern Iowa Airport|Cedar Rapids/Iowa City]], [[University of Illinois Willard Airport|Champaign]], [[Charleston International Airport|Charleston (SC)]], [[Chattanooga Metropolitan Airport|Chattanooga]],<ref>{{Cite web |title=American Airlines Resumes Chicago – Chattanooga From Oct 2025 |url=https://www.aeroroutes.com/eng/250528-aaoct25ordcha |access-date=2025-05-28 |website=AeroRoutes |language=en-CA}}</ref> [[Cincinnati/Northern Kentucky International Airport|Cincinnati]], [[Cleveland Hopkins International Airport|Cleveland]], [[Colorado Springs Airport|Colorado Springs]],<ref>{{Cite web |date=2024-12-10 |title=American Airlines to Restore Service to Chicago from Colorado Springs |url=https://www.aviationpros.com/airports/news/55248561/american-airlines-to-restore-service-to-chicago-from-colorado-springs |access-date=2024-12-10 |website=Aviation Pros |language=en}}</ref> [[Columbia Regional Airport|Columbia (MO)]], [[John Glenn Columbus International Airport|Columbus–Glenn]], [[Dayton International Airport|Dayton]], [[Des Moines International Airport|Des Moines]], [[Detroit Metropolitan Airport|Detroit]], [[El Paso International Airport|El Paso]], [[Evansville Regional Airport|Evansville]],<ref>{{cite web | url=https://flyevv.com/about-evansville-regional-airport/news/new-nonstop-flights-to-chicago | title=NEW! Nonstop flights to Chicago! }}</ref> [[Hector International Airport|Fargo]], [[Northwest Arkansas National Airport|Fayetteville/Bentonville]], [[Bishop International Airport|Flint]], [[Fort Wayne International Airport|Fort Wayne]], [[Gerald R. Ford International Airport|Grand Rapids]], [[Green Bay–Austin Straubel International Airport|Green Bay]], [[Piedmont Triad International Airport|Greensboro]], [[Greenville–Spartanburg International Airport|Greenville/Spartanburg]], [[Harrisburg International Airport|Harrisburg]], [[Bradley International Airport|Hartford]], [[George Bush Intercontinental Airport|Houston–Intercontinental]],{{cn|date=May 2025}} [[Huntsville International Airport|Huntsville]], [[Indianapolis International Airport|Indianapolis]], [[Jacksonville International Airport|Jacksonville (FL)]], [[Kalamazoo/Battle Creek International Airport|Kalamazoo]], [[Kansas City International Airport|Kansas City]], [[McGhee Tyson Airport|Knoxville]], [[La Crosse Regional Airport|La Crosse]], [[Capital Region International Airport|Lansing]], [[Greenbrier Valley Airport|Lewisburg (WV)]],<ref name="LWBSHD">https://www.regulations.gov/document/DOT-OST-2002-11378-0151</ref><ref name="Erratum">https://www.regulations.gov/document/DOT-OST-2002-11378-0152</ref> [[Blue Grass Airport|Lexington]], [[Clinton National Airport|Little Rock]], [[Louisville Muhammad Ali International Airport|Louisville]], [[Dane County Regional Airport|Madison]], [[Manhattan Regional Airport|Manhattan (KS)]], [[Sawyer International Airport|Marquette]], [[Memphis International Airport|Memphis]], [[Milwaukee Mitchell International Airport|Milwaukee]], [[Minneapolis–Saint Paul International Airport|Minneapolis/St. Paul]], [[Quad Cities International Airport|Moline/Quad Cities]], [[Montréal–Trudeau International Airport|Montréal–Trudeau]],{{cn|date=May 2025}} [[Central Wisconsin Airport|Mosinee/Wausau]], [[Nashville International Airport|Nashville]],  [[Louis Armstrong New Orleans International Airport|New Orleans]], [[Newark Liberty International Airport|Newark]], [[Norfolk International Airport|Norfolk]], [[Will Rogers World Airport|Oklahoma City]], [[Eppley Airfield|Omaha]], [[General Wayne A. Downing Peoria International Airport|Peoria]], [[Pittsburgh International Airport|Pittsburgh]], [[Rhode Island T. F. Green International Airport|Providence]], [[Raleigh–Durham International Airport|Raleigh/Durham]], [[Rapid City Regional Airport|Rapid City]], [[Richmond International Airport|Richmond]], [[Roanoke–Blacksburg Regional Airport|Roanoke]],<ref name=AAORDNew25 /> [[Rochester International Airport|Rochester (MN)]], [[Greater Rochester International Airport|Rochester (NY)]], [[St. Louis Lambert International Airport|St. Louis]], [[Salt Lake City International Airport|Salt Lake City]], [[Shenandoah Valley Regional Airport|Shenandoah Valley]],<ref name="LWBSHD"/><ref name="Erratum"/> [[Sioux Falls Regional Airport|Sioux Falls]], [[Abraham Lincoln Capital Airport|Springfield (IL)]], [[Springfield–Branson National Airport|Springfield/Branson]], [[Syracuse Hancock International Airport|Syracuse]], [[Toronto Pearson International Airport|Toronto–Pearson]], [[Cherry Capital Airport|Traverse City]], [[Tulsa International Airport|Tulsa]], [[Waterloo Regional Airport|Waterloo (IA)]], [[Westchester County Airport|White Plains]], [[Wichita Dwight D. Eisenhower National Airport|Wichita]], [[Wilkes-Barre/Scranton International Airport|Wilkes-Barre/Scranton]]<br />'''Seasonal:''' [[Albuquerque International Sunport|Albuquerque]],{{cn|date=May 2025}} [[Billings Logan International Airport|Billings]],{{cn|date=May 2025}} [[Bozeman Yellowstone International Airport|Bozeman]],{{cn|date=May 2025}} [[Burlington International Airport|Burlington (VT)]],{{cn|date=May 2025}} [[Calgary International Airport|Calgary]],{{cn|date=May 2025}} [[Dallas Fort Worth International Airport|Dallas/Fort Worth]],{{cn|date=May 2025}} [[Halifax Stanfield International Airport|Halifax]],<ref>{{cite news |last1=Shon |first1=Stella |title=American Airlines Adds Flights to Quebec, Calgary, Bozeman, and More From These U.S. Hubs |url=https://www.yahoo.com/lifestyle/american-airlines-adds-flights-quebec-174648790.html?guccounter=1 |access-date=24 December 2024 |work=Yahoo Life |publisher=Travel + Leisure |date=2024-12-23}}</ref> [[Yampa Valley Airport|Hayden/Steamboat Springs]],<ref>{{cite web |title=American Resumes Chicago – Hayden/Steamboat Springs From late-Dec 2023 |url=https://www.aeroroutes.com/eng/231002-aanw23ordhdn |website=Aeroroutes |access-date=October 2, 2023}}</ref> [[Hilton Head Airport|Hilton Head]],{{cn|date=May 2025}} [[Cape Cod Gateway Airport|Hyannis]],<ref>{{cite web|url=https://www.aeroroutes.com/eng/241010-aans25hya|title=AMERICAN AIRLINES EXPANDS CAPE COD SERVICE IN NS25|publisher=AeroRoutes|date=October 10, 2024|accessdate=October 10, 2024}}</ref> [[Idaho Falls Regional Airport|Idaho Falls]],<ref>{{cite web |title=American Airlines launches seasonal Flights between Chicago and Idaho Falls |date=April 19, 2025 |url=https://www.jetsaver.com/blogs/american-airlines-launches-seasonal-flights-between-chicago-and-idaho-falls}}</ref> [[Key West International Airport|Key West]],{{cn|date=May 2025}} [[Manchester–Boston Regional Airport|Manchester (NH)]],{{cn|date=May 2025}} [[Martha's Vineyard Airport|Martha's Vineyard]],{{cn|date=May 2025}} [[Missoula International Airport|Missoula]],<ref name="AA routes">{{cite web|url=https://aviationa2z.com/index.php/2025/06/26/american-airlines-2-new-destinations-7-routes-for-winter-2025-26/|title=American Airlines adds Two New Destinations, 7 routes for Winter 2025-26|publisher=Aviation A2Z|date=June 26, 2025|accessdate=June 28, 2025}}</ref> [[Myrtle Beach International Airport|Myrtle Beach]],{{cn|date=May 2025}} [[Nantucket Memorial Airport|Nantucket]],{{cn|date=May 2025}} [[Northwest Florida Beaches International Airport|Panama City (FL)]],{{cn|date=May 2025}} [[Pensacola International Airport|Pensacola]],{{cn|date=May 2025}} [[Portland International Jetport|Portland (ME)]],{{cn|date=May 2025}} [[Québec City Jean Lesage International Airport|Québec City]],{{cn|date=May 2025}} [[Santa Fe Regional Airport|Santa Fe]] (begins December 18, 2025),<ref name="AA routes"/> [[Sarasota–Bradenton International Airport|Sarasota]], [[Savannah/Hilton Head International Airport|Savannah]], [[Friedman Memorial Airport|Sun Valley]] (begins December 18, 2025),<ref name="AA routes"/> [[Wilmington International Airport|Wilmington (NC)]]{{cn|date=May 2025}} | <ref name="AmericanRoutes"/>
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| [[Arajet]] | [[Punta Cana International Airport|Punta Cana]]<ref>{{cite web | url= https://www.streetinsider.com/dr/news.php?id=24826516&gfv=1 | title= Arajet Announces Chicago O'Hare Route, Now Servicing Five Major U.S. Cities | date=20 May 2025 }}</ref> | <ref>{{cite web|title=Destinations|url= https://www.arajet.com/en/destinations|website=Arajet}}</ref>
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| [[Austrian Airlines]] | [[Vienna Airport|Vienna]] | <ref>{{cite web|url=https://www.austrian.com/sk/Info/Flightinformation/Timetable?sc_lang=sk&cc=SK|title=Austrian Timetable|publisher=Austrian Airlines|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20190331094119/https://www.austrian.com/sk/Info/Flightinformation/Timetable?sc_lang=sk&cc=SK|archive-date=March 31, 2019|url-status=live}}</ref>
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| [[Avelo Airlines]] |[[Concord–Padgett Regional Airport|Charlotte/Concord]] (begins February 12, 2026),<ref name="XPUSA26">{{cite web|title= Avelo Airlines adds Chicago, Nashville routes from Concord airport|url= https://www.wcnc.com/article/travel/avelo-airlines-adds-nonstop-flights-from-concord-north-carolina-chicago-nashville/275-58d8fa1d-c549-4053-8025-11b3151f91ad
|website=WCNC Charlotte|date=November 12, 2025|access-date=November 12, 2025}}</ref> [[Wilmington Airport (Delaware)|Wilmington (DE)]] (begins March 12, 2026)<ref name="XPILG26">{{cite web|title= Avelo Adds Three New Routes, Brings Back Three Others|url= https://airlinegeeks.com/2025/11/12/avelo-adds-three-new-routes-brings-back-three-others/
|website=Airline Geeks|date=November 12, 2025|access-date=November 12, 2025}}</ref> <br /> '''Seasonal:''' [[Tweed New Haven Airport|New Haven]]<ref>{{cite web|url= https://www.morningstar.com/news/pr-newswire/20250403da56860/avelo-airlines-opens-wilmington-nc-base-of-operations-inaugurates-7-new-nonstop-routes-and-adds-chicago-ohare|title= Avelo Airlines Opens Wilmington, N.C. Base of Operations, Inaugurates 7 New Nonstop Routes and Adds Chicago O'Hare|publisher=Morningstar|date=April 3, 2025|accessdate=April 3, 2025}}</ref> | <ref>{{cite web|url=https://www.aveloair.com/destinations/|title=Destinations|website=Avelo Airlines|access-date=January 18, 2022|archive-date=November 7, 2023|archive-url=https://web.archive.org/web/20231107173629/https://www.aveloair.com/destinations/|url-status=live}}</ref>
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| [[Avianca]] | [[El Dorado International Airport|Bogotá]] | <ref>{{Cite web |last=Mazó |first=Edgardo Gimenez |date=2024-07-09 |title=Avianca to Operate Daily Flights Between Bogotá and Chicago |url=https://aviacionline.com/2024/07/avianca-to-operate-daily-flights-between-bogota-and-chicago/ |access-date=2024-07-09 |website=Aviacionline |language=es}}</ref>
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| [[Avianca Costa Rica]] | '''Seasonal:''' [[La Aurora International Airport|Guatemala City]],{{cn|date=May 2025}} [[Juan Santamaría International Airport|San José (CR)]]<ref>{{cite web |title=AVIANCA COSTA RICA RESUMES 2 US ROUTES FROM DEC 2023|url=https://www.aeroroutes.com/eng/230913-avdec23us |website=Aeroroutes |access-date=September 13, 2023}}</ref> | <ref>{{cite web |title=Check itineraries |url=https://www.avianca.com/br/en/electronic-services/check-itineraries/ |access-date=August 5, 2018 |archive-date=June 20, 2018 |archive-url=https://web.archive.org/web/20180620180731/https://www.avianca.com/br/en/electronic-services/check-itineraries/ |url-status=dead }}</ref>
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| [[Avianca El Salvador]] | '''Seasonal:''' [[El Salvador International Airport|San Salvador]]<ref name="SAL-ORD"/> | <ref name="SAL-ORD">{{cite web |url=https://www.aeroroutes.com/eng/250207-avns25salord| title=Avianca Resumes San Salvador-Chicago Service in NS25 | date= 7 February 2025 |publisher=aeroroutes.com}}</ref>
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| [[British Airways]] | [[Heathrow Airport|London–Heathrow]]<ref>{{Cite web |title=British Airways NS26 Intercontinental Service Changes – 20OCT25 |url=https://www.aeroroutes.com/eng/251020-bans26inc |access-date=2025-10-21 |website=AeroRoutes |language=en-CA}}</ref> | <ref>{{cite web|url=https://www.britishairways.com/travel/schedules/public/en_gb|title=Timetables|publisher=British Airways|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170330083400/https://www.britishairways.com/travel/schedules/public/en_gb|archive-date=March 30, 2017|url-status=live}}</ref>
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| [[Cathay Pacific]] | [[Hong Kong International Airport|Hong Kong]]<ref>{{OAGWorldAug2025Ref|title=Hong Kong (SAR) China HKG|pages=543-547}}</ref><ref>{{cite web|url=https://www.aeroroutes.com/eng/230515-cxoct23ord|title=Cathay Pacific Resumes Chicago Service from Oct 2023|publisher=AeroRoutes|date=May 15, 2023|accessdate=May 15, 2023}}</ref> | <ref>{{cite web|url=https://www.cathaypacific.com/cx/en_CA/book-a-trip/timetable.html|title=Flight Timetable|publisher=Cathay Pacific|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170701155740/https://www.cathaypacific.com/cx/en_CA/book-a-trip/timetable.html|archive-date=July 1, 2017|url-status=live}}</ref>
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| [[Contour Airlines]] | [[Southeast Iowa Regional Airport|Burlington (IA)]],<ref>{{cite web |title=Contour Airlines Adds Chicago – Burlington IA From July 2025 |url=https://www.aeroroutes.com/eng/250520-lf3q25ordbrl |website=Aeroroutes |access-date=20 May 2025}}</ref> [[Cape Girardeau Regional Airport|Cape Girardeau]],<ref name="LF">{{cite web |title=Contour Airlines October 2024 Network Additions |url=https://www.aeroroutes.com/eng/240725-lfoct24 |website=Aeroroutes |access-date=25 July 2024}}</ref> [[Waynesville–St. Robert Regional Airport|Fort Leonard Wood]],<ref name="LF"/> [[Kirksville Regional Airport|Kirksville]], [[Manistee County Blacker Airport|Manistee]],<ref>{{cite web |title=Contour Airlines Adds Chicago – Manistee Service From Oct 2024 |url=https://www.aeroroutes.com/eng/240924-lfoct24mbl |website=Aeroroutes |access-date=24 September 2024}}</ref> [[Veterans Airport of Southern Illinois|Marion]], [[Owensboro–Daviess County Regional Airport|Owensboro]], [[Quincy Regional Airport|Quincy]]<ref name="Quincy">{{cite web|title=Contour Airlines Adds Chicago – Quincy From Nov 2025|url=https://www.aeroroutes.com/eng/250915-lfnw25uin |website=Aeroroutes |access-date=15 September 2025}}</ref>| <ref>{{Cite web|url=https://www.contourairlines.com/plan-and-book/items/route-map|title=Route Map|access-date=June 20, 2021|archive-date=June 24, 2021|archive-url=https://web.archive.org/web/20210624203032/https://www.contourairlines.com/plan-and-book/items/route-map|url-status=live}}</ref>
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| [[Copa Airlines]] | [[Tocumen International Airport|Panama City–Tocumen]] | <ref>{{cite web|url=https://www.copaair.com/en/web/ca/timetables|title=Flight Schedule|publisher=Copa Airlines|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20171109191849/https://www.copaair.com/en/web/ca/timetables|archive-date=November 9, 2017|url-status=live}}</ref>
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| [[Delta Air Lines]] | [[Hartsfield–Jackson Atlanta International Airport|Atlanta]], [[Logan International Airport|Boston]], [[Detroit Metropolitan Airport|Detroit]], [[Los Angeles International Airport|Los Angeles]] (begins June 7, 2026),<ref>{{cite web |url=https://www.travelpulse.com/news/airlines-airports/delta-to-launch-nonstop-flights-from-lax-to-hong-kong-in-2026|title=Delta to launch nonstop flights from LAX to Hong Kong|publisher=Travel Pulse|date=July 16, 2025|accessdate=July 17, 2025}}</ref> [[Minneapolis–Saint Paul International Airport|Minneapolis/St. Paul]], [[LaGuardia Airport|New York–LaGuardia]], [[Salt Lake City International Airport|Salt Lake City]], [[Seattle–Tacoma International Airport|Seattle/Tacoma]] | <ref name="DeltaRoutes">{{cite web|title=FLIGHT SCHEDULES|url=https://www.delta.com/flightinfo/viewFlightSchedulesSetup.action|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20150621123636/http://www.delta.com/flightinfo/viewFlightSchedulesSetup.action|archive-date=June 21, 2015|url-status=live}}</ref>
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| [[Delta Connection]] |  [[John F. Kennedy International Airport|New York–JFK]], [[LaGuardia Airport|New York–LaGuardia]] | <ref name="DeltaRoutes"/>
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| [[Denver Air Connection]] | [[Dubuque Regional Airport|Dubuque]],<ref>{{Cite web|url=https://www.kcrg.com/2024/08/27/live-commercial-air-service-return-dubuque-regional-airport/|title=Dubuque Regional Airport adds daily service to Chicago starting in November|access-date=August 27, 2024|website=KCRG|date=August 27, 2024 }}</ref> [[Gogebic–Iron County Airport|Ironwood]], [[McKellar–Sipes Regional Airport|Jackson (TN)]],<ref>{{cite web |title=Denver Air Connection Adds Jackson Tennessee Service From Dec 2024 |url=https://www.aeroroutes.com/eng/240911-kgnw24mkl |website=Aeroroutes |access-date=11 September 2024}}</ref> [[Muskegon County Airport|Muskegon]]<ref name=DACMKG>{{cite web|url=https://www.fox17online.com/news/local-news/lakeshore/muskegon/muskegon-county-airport-adding-denver-air-connection|title=Muskegon County Airport adding Denver Air Connection|website=Fox 17 News|date= September 19, 2024|accessdate=2024-09-20}}</ref>| <ref>{{cite web|url=https://denverairconnection.com/|title=Denver Air Connection - Reliable, On-Time Flights|website=Denver Air Connection|access-date=April 14, 2021|archive-date=April 15, 2021|archive-url=https://web.archive.org/web/20210415155721/https://denverairconnection.com/|url-status=live}}</ref> 
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| [[Emirates (airline)|Emirates]] | [[Dubai International Airport|Dubai–International]]<ref>{{OAGWorldJuly2025Ref|title=Dubai, United Arab Emirates DXB|pages=345-351}}</ref> | <ref>{{cite web|url=https://www.emirates.com/ca/english/destinations_offers/timetables/flightschedule.aspx|title=Flight Schedules|publisher=Emirates|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170630185434/https://www.emirates.com/ca/english/destinations_offers/timetables/flightschedule.aspx|archive-date=June 30, 2017|url-status=live}}</ref>
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| [[Ethiopian Airlines]] | [[Addis Ababa Bole International Airport|Addis Ababa]] | <ref>{{cite web|title=Schedule – Fly Ethiopian|url=https://www.ethiopianairlines.com/AA/EN/book/booking/flight-schedule|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20190331065638/https://www.ethiopianairlines.com/AA/EN/book/booking/flight-schedule|archive-date=March 31, 2019|url-status=live}}</ref>
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| [[Etihad Airways]] | [[Zayed International Airport|Abu Dhabi]]<ref>{{OAGWorldAug2025Ref|title=Abu Dhabi, United Arab Emirates AUH|pages=14-16}}</ref> | <ref>{{cite web|url=http://www.etihad.com/en-ca/plan-and-book/flight-timetables/|title=Flight Timetables|publisher=Etihad Airways|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170421022706/http://www.etihad.com/en-ca/plan-and-book/flight-timetables/|archive-date=April 21, 2017|url-status=live}}</ref>
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| [[EVA Air]] | [[Taoyuan International Airport|Taipei–Taoyuan]]<ref>{{OAGWorldAug2025Ref|title=Taipei, Chinese Taipei TPE|pages=1253-1255}}</ref> | <ref>{{cite web|url=https://booking.evaair.com/flyeva/EVA/B2C/flight-schedules.aspx|title=Timetables |publisher=EVA Air|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170516001221/http://booking.evaair.com/flyeva/EVA/B2C/flight-schedules.aspx|archive-date=May 16, 2017|url-status=live}}</ref>
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| [[Finnair]] | '''Seasonal:''' [[Helsinki Airport|Helsinki]]<ref>{{Cite web |title=Finnair NS25 Long-Haul Service Expansion – 21OCT24 |url=https://www.aeroroutes.com/eng/241021-ayns25inc |access-date=2025-01-31 |website=AeroRoutes |language=en-CA}}</ref> | <ref>{{cite web| title=Finnair flight timetable|url=https://www.finnair.com/at/gb/information-services/flights/timetable|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180612140402/https://www.finnair.com/at/gb/information-services/flights/timetable|archive-date=June 12, 2018|url-status=live}}</ref>
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| [[Frontier Airlines]] | [[Hartsfield–Jackson Atlanta International Airport|Atlanta]], [[Austin–Bergstrom International Airport|Austin]],<ref>{{cite web |title=Frontier Airlines 1Q25 Various Network Resumptions |url=https://www.aeroroutes.com/eng/241120-f91q25 |website=Aeroroutes |access-date=20 November 2024}}</ref> [[Cancún International Airport|Cancún]], [[Charlotte Douglas International Airport|Charlotte]],<ref name=FRO>{{cite web |title=Frontier Airlines Announces New Routes, Expanding Operations Across 38 Airports |url=https://news.flyfrontier.com/frontier-airlines-announces-new-routes-expanding-operations-across-38-airports/ |website=Frontier |access-date=18 March 2025}}</ref> [[Dallas Fort Worth International Airport|Dallas/Fort Worth]],<ref name=FRO /> [[Denver International Airport|Denver]],<ref name=FRO /> [[Fort Lauderdale–Hollywood International Airport|Fort Lauderdale]] (begins November 20, 2025),<ref>{{cite web| url=https://news.flyfrontier.com/frontier-americas-low-fare-airline-commits-to-being-the-1-low-fare-carrier-in-the-top-20-us-metros| title= FRONTIER, AMERICA’S LOW FARE AIRLINE, COMMITS TO BEING THE #1 LOW FARE CARRIER IN THE TOP 20 U.S. METROS}}</ref> [[Southwest Florida International Airport|Fort Myers]],<ref name=FRONEW /> [[George Bush Intercontinental Airport|Houston–Intercontinental]],<ref name=FRO2>{{Cite web|url=https://news.flyfrontier.com/frontier-airlines-announces-17-new-routes-across-multiple-airports--spanning-the-us-and-caribbean/|title=Frontier Airlines Announces 17 New Routes Across Multiple Airports, Spanning the U.S. and Caribbean|website=Frontier Airlines Announces 17 New Routes Across Multiple Airports, Spanning the U.S. and Caribbean}}</ref> [[Harry Reid International Airport|Las Vegas]],<ref>{{cite web |title=Frontier Airlines 2Q24 Las Vegas Domestic Service Resumptions |url=https://www.aeroroutes.com/eng/240123-f92q24las |website=Aeroroutes |access-date=January 23, 2024}}</ref> [[Los Angeles International Airport|Los Angeles]],<ref>{{cite news |last1=Ewing |first1=Ryan |title=Frontier Adds 14 Routes, Returns to Two Airports |url=https://airlinegeeks.com/2025/02/18/frontier-adds-14-routes-returns-to-two-airports/ |access-date=18 March 2025 |work=Airline Geeks |date=18 February 2025}}</ref> [[Minneapolis–Saint Paul International Airport|Minneapolis/St. Paul]] (begins November 23, 2025),<ref>{{cite web |title=Frontier Airlines NW25 Further Network Expansion |url=https://www.aeroroutes.com/eng/250905-f9nw25 |website=Aeroroutes |access-date=6 September 2025}}</ref> [[Nashville International Airport|Nashville]],<ref>{{cite web|title=Frontier Airlines to expand Nashville service this spring.|website=[[The Tennessean]] |url=https://www.tennessean.com/story/news/local/2024/02/28/nashville-frontier-airlines-chicago-ohare-new-route/72771334007/}}</ref> [[John F. Kennedy International Airport|New York–JFK]],<ref>{{cite web|url=https://airlinegeeks.com/2025/07/22/frontier-announces-15-new-routes/|title=Frontier Announces 15 New Routes|last=Vasile|first=Zach|work=Airline Geeks|date=July 22, 2025|access-date=July 22, 2025}}</ref> [[Orlando International Airport|Orlando]], [[Philadelphia International Airport|Philadelphia]],<ref>{{cite web|title=Frontier Airlines increases summer schedule at PHL by 47% with 10 new routes|date=February 7, 2024 |url=https://www.bizjournals.com/philadelphia/news/2024/02/07/frontier-airlines-new-routes-phliadelphia-airport.html|access-date= February 7, 2024}}</ref> [[Phoenix Sky Harbor International Airport|Phoenix–Sky Harbor]], [[Punta Cana International Airport|Punta Cana]], [[Salt Lake City International Airport|Salt Lake City]],<ref>{{Cite web|title=Frontier Airlines Announces New Routes, Expanding Operations Across 12 Airports|date=April 4, 2024|url=https://news.flyfrontier.com/frontier-airlines-announces-new-routes-expanding-operations-across-12-airports/|access-date= April 5, 2024}}</ref> [[San Diego International Airport|San Diego]],<ref>{{Cite web|title=Frontier Airlines Introducing three new routes through San Diego|access-date=March 25, 2025|url=https://fox5sandiego.com/news/business/frontier-airlines-introducing-three-new-routes-through-san-diego/amp/|archive-date=April 1, 2025|archive-url=https://web.archive.org/web/20250401020506/https://fox5sandiego.com/news/business/frontier-airlines-introducing-three-new-routes-through-san-diego/amp/|url-status=bot: unknown|website=FOX 5 San Diego KUSI news|date=March 25, 2025}}</ref> [[Sarasota-Bradenton International Airport|Sarasota]],<ref name=FRONEW /> [[Tampa International Airport|Tampa]],<ref name=FRONEW /> [[West Palm Beach International Airport|West Palm Beach]]<ref name=FRONEW>{{cite web | url=https://news.flyfrontier.com/frontier-airlines-announces-22-new-routes-launching-in-december/ | title=Frontier Airlines Announces 22 New Routes Launching in December}}</ref> <br />'''Seasonal:''' [[Baltimore/Washington International Airport|Baltimore]]<ref>{{cite web|title= Frontier Adds Baltimore-Chicago, Trenton-Myrtle Beach|url= https://www.airwaysmag.com/new-post/frontier-baltimore-chicago-trenton-myrtle-beach |website=Airways |access-date=May 6, 2025}}</ref> | <ref name="FrontierRoutes">{{cite web|title=Frontier|url=https://www.flyfrontier.com|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170912053526/https://www.flyfrontier.com/|archive-date=September 12, 2017|url-status=live}}</ref>
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| [[HiSky]] | [[Bucharest Henri Coandă International Airport|Bucharest–Otopeni]] (begins June 4, 2026)<ref>{{Cite web |last=Alexe |first=Anca |date=2025-09-17 |title=HiSky to introduce direct flights between Bucharest and Chicago starting 2026 |url=https://business-review.eu/business/airlines/hisky-to-introduce-direct-flights-between-bucharest-and-chicago-288722 |access-date=2025-09-17 |website=Business Review |language=ro}}</ref> | <ref>{{cite web |title=Destinations |url= https://hisky.aero/en/dst?Origin1=OTP|website=HiSky|access-date=December 22, 2023}}</ref>
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| [[Iberia (airline)|Iberia]] | [[Adolfo Suárez Madrid–Barajas Airport|Madrid]] | <ref>{{cite web|title=Flight times – Iberia|url=https://www.iberia.com/gb/schedules/|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180317232127/https://www.iberia.com/gb/schedules/|archive-date=March 17, 2018|url-status=live}}</ref>
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| [[Icelandair]] | [[Keflavík International Airport|Reykjavík–Keflavík]] | <ref>{{cite web|url=http://www.icelandair.ca/information/travel-guide/timetable/|title=Flight Schedule|publisher=Icelandair|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20171116064841/http://www.icelandair.ca/information/travel-guide/timetable/|archive-date=November 16, 2017|url-status=live}}</ref>
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| [[ITA Airways]] | '''Seasonal:''' [[Rome Fiumicino Airport|Rome–Fiumicino]]<ref>{{cite web |last1=Liu |first1=Jim |title=ITA Airways Schedules Chicago April 2024 Launch |url=https://www.aeroroutes.com/eng/231012-azns24ord |website=aeroroutes.com |access-date=4 February 2025 |date=12 October 2023}}</ref> | <ref>{{cite web|url=https://www.itaspa.com/en_it/fly-ita/ita-world/network.html|title=ITA AIRWAYS WORLD|website=Itaspa.com|access-date=February 22, 2022|archive-date=October 16, 2021|archive-url=https://web.archive.org/web/20211016051605/https://www.itaspa.com/en_it/fly-ita/ita-world/network.html|url-status=dead}}</ref>
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| [[Japan Airlines]] | [[Haneda Airport|Tokyo–Haneda]], [[Narita International Airport|Tokyo–Narita]]<ref>{{cite web|url=https://airlinegeeks.com/2025/01/21/japan-airlines-to-expand-u-s-network/|title=Japan Airlines to Expand U.S. Network|publisher=Airline Geeks|date=January 21, 2025|accessdate=January 21, 2025}}</ref> | <ref>{{cite web|title=Japan Airlines Timetables|url=http://www.jal.co.jp/en/inter/route/time/|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20181015202347/http://www.jal.co.jp/en/inter/route/time/|archive-date=October 15, 2018|url-status=live}}</ref>
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| [[JetBlue]] | [[Logan International Airport|Boston]], [[John F. Kennedy International Airport|New York–JFK]] | <ref>{{cite web |title=Where We Jet: Flight Destinations |url=https://www.jetblue.com/route-map/?origin=ORD |website=JetBlue.com |publisher=JetBlue Airways |access-date=January 16, 2020 |archive-date=April 6, 2023 |archive-url=https://web.archive.org/web/20230406143432/https://www.jetblue.com/route-map/?origin=ORD |url-status=dead }}</ref>
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| [[KLM]] | [[Amsterdam Airport Schiphol|Amsterdam]] | <ref>{{cite web|url=https://www.klm.com/travel/ca_en/prepare_for_travel/up_to_date/timetable/index.htm|title=View the Timetable|publisher=KLM|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170912011516/https://www.klm.com/travel/ca_en/prepare_for_travel/up_to_date/timetable/index.htm|archive-date=September 12, 2017|url-status=live}}</ref>
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| [[Korean Air]] | [[Incheon International Airport|Seoul–Incheon]]<ref>{{OAGWorldAug2025Ref|title=Seoul, Korea Republic Of SEL|pages=1186-1190}}</ref> | <ref>{{cite web|url=https://www.koreanair.com/global/en/booking/schedule-flight.html#schedule|title=Flight Status and Schedules|publisher=Korean Air|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180628234008/https://www.koreanair.com/global/en/booking/schedule-flight.html#schedule|archive-date=June 28, 2018|url-status=live}}</ref>
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| [[LOT Polish Airlines]] | [[Kraków John Paul II International Airport|Kraków]], [[Warsaw Chopin Airport|Warsaw–Chopin]] | <ref>{{cite web|url=http://www.lot.com/lt/en/flights-schedule|title=Timetables|publisher=LOT Polish Airlines|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170506070656/http://www.lot.com/lt/en/flights-schedule|archive-date=May 6, 2017|url-status=live}}</ref>
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| [[Lufthansa]] | [[Frankfurt Airport|Frankfurt]], [[Munich Airport|Munich]] | <ref>{{cite web|url=http://www.lufthansa.com/ca/en/Online-timetable|title=Timetable – Lufthansa Canada|publisher=Lufthansa|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20171109191434/http://www.lufthansa.com/ca/en/Online-timetable|archive-date=November 9, 2017|url-status=live}}</ref>
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| [[Qatar Airways]] | [[Hamad International Airport|Doha]] | <ref name="QatarRoutes">{{cite web|title=Flight timetable|url=https://booking.qatarairways.com/nsp/views/timeTableIndex.xhtml|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20171004005550/https://booking.qatarairways.com/nsp/views/timeTableIndex.xhtml|archive-date=October 4, 2017|url-status=live}}</ref>
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| [[Royal Jordanian]] | [[Queen Alia International Airport|Amman–Queen Alia]] | <ref name="RoyalJordanianRoutes">{{cite web| title=Route Map| url=http://www.rj.com/en/destinations/route_map| publisher=Royal Jordanian Airlines| access-date=April 5, 2017| archive-url=https://web.archive.org/web/20180805082904/https://www.rj.com/en/destinations/route_map| archive-date=August 5, 2018| url-status=dead}}</ref>
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| [[Scandinavian Airlines]] | [[Copenhagen Airport|Copenhagen]]<ref>{{Cite web |title=SAS NS26 Intercontinental Network Changes – 06JUL25 |url=https://www.aeroroutes.com/eng/250708-skns26inc |access-date=2025-07-09 |website=AeroRoutes |language=en-CA}}</ref> | <ref>{{cite web|title=Timetable – SAS|url=https://www.flysas.com/en/us/Generic/Services/Timetable/|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180317232132/https://www.flysas.com/en/us/Generic/Services/Timetable/|archive-date=March 17, 2018|url-status=live}}</ref>
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| [[Southwest Airlines]] | [[Austin-Bergstrom International Airport|Austin]], [[Baltimore/Washington International Airport|Baltimore]], [[Cancún International Airport|Cancún]], [[Dallas Love Field|Dallas–Love]], [[Denver International Airport|Denver]], [[Harry Reid International Airport|Las Vegas]], [[Nashville International Airport|Nashville]], [[Orlando International Airport|Orlando]], [[Phoenix Sky Harbor International Airport|Phoenix–Sky Harbor]]<br />'''Seasonal:''' [[Northwest Florida Beaches International Airport|Panama City (FL)]] (begins April 9, 2026)<ref name="WNORDtoECP">{{cite web|url= https://www.travelandtourworld.com/news/article/southwest-airlines-expands-2026-travel-network-to-st-maarten-orlando-baltimore-knoxville-denver-chicago-panama-city-with-new-eva-air-partnership/|title= Southwest Airlines Expands 2026 Travel Network to St. Maarten, Orlando, Baltimore, Knoxville, Denver, Chicago, Panama City with New EVA Air Partnership|website=Travel and Tour World|date=August 26, 2025|access-date=August 30, 2025}}</ref> | <ref name="SWATable">{{cite web |title=Southwest Airlines - Check Flight Schedules |url=https://www.southwest.com/air/flight-schedules/ |access-date=February 15, 2021 |archive-date=October 13, 2020 |archive-url=https://web.archive.org/web/20201013193450/https://www.southwest.com/air/flight-schedules/ |url-status=live }}</ref>
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| [[Spirit Airlines]] | [[Baltimore/Washington International Airport|Baltimore]],<ref name="SAEw20NR">{{Cite web|url=https://aviationa2z.com/index.php/2025/03/08/spirit-airlines-expands-with-20-new-routes-cuts-5-destinations/ |title=Spirit Airlines Expands with 20+ New Routes |date=March 7, 2025 |publisher=Aviation A2Z  |accessdate=March 7, 2025 |archive-url=https://web.archive.org/web/20250308025823/https://aviationa2z.com/index.php/2025/03/08/spirit-airlines-expands-with-20-new-routes-cuts-5-destinations/ |archive-date=2025-03-08 |url-status=live}}</ref> [[Cancún International Airport|Cancún]], [[Dallas Fort Worth International Airport|Dallas/Fort Worth]], [[Fort Lauderdale–Hollywood International Airport|Fort Lauderdale]], [[Southwest Florida International Airport|Fort Myers]], [[George Bush Intercontinental Airport|Houston–Intercontinental]], [[Harry Reid International Airport|Las Vegas]] (ends December 2, 2025),<ref>{{cite web | title=Spirit Airlines Nov/Dec 2025 Suspended Routes Summary – 12OCT25 | url=https://www.aeroroutes.com/eng/2551015-nkdec25 }}</ref> [[Los Angeles International Airport|Los Angeles]], [[Miami International Airport|Miami]], [[Nashville International Airport|Nashville]],<ref name="SAEw20NR"/> [[Louis Armstrong New Orleans International Airport|New Orleans]], [[LaGuardia Airport|New York–LaGuardia]], [[Newark Liberty International Airport|Newark]],<ref>{{cite web |title=Spirit Airlines June/July 2024 Latest Network Additions |url=https://www.aeroroutes.com/eng/240410-nkjun24 |website=Aeroroutes |access-date=10 April 2024}}</ref>  [[Orlando International Airport|Orlando]], [[Luis Muñoz Marín International Airport|San Juan]], [[Tampa International Airport|Tampa]]<br />'''Seasonal:''' [[Myrtle Beach International Airport|Myrtle Beach]],{{cn|date=May 2025}} | <ref name="SpiritRoutes">{{cite web| title=Where We Fly| url=https://www.spirit.com/RouteMaps.aspx| publisher=Spirit Airlines| access-date=March 17, 2018| archive-url=https://web.archive.org/web/20171223042503/https://www.spirit.com/routemaps.aspx| archive-date=December 23, 2017| url-status=live}}</ref>
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| [[Sun Country Airlines]] | [[Minneapolis–Saint Paul International Airport|Minneapolis/St. Paul]] | <ref>{{cite web |title=Route Map & Flight Schedule |url=https://www.suncountry.com/Explore/Route-Map.html |access-date=March 17, 2018 |archive-url=https://web.archive.org/web/20180815090927/https://www.suncountry.com/Explore/Route-Map.html |archive-date=August 15, 2018 |url-status=live }}</ref>
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| {{nowrap|[[Swiss International Air Lines]]}} | [[Zurich Airport|Zurich]] | <ref>{{cite web|title=Timetable|url=https://www.swiss.com/CH/EN/book/flight-information/timetable.html|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20180317232924/https://www.swiss.com/CH/EN/book/flight-information/timetable.html|archive-date=March 17, 2018|url-status=live}}</ref>
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| [[TAP Air Portugal]] | [[Lisbon Airport|Lisbon]] | <ref>{{cite web| title=Flight Schedule| url=https://www.flytap.com/en-pt/| publisher=TAP Air Portugal| access-date=November 29, 2018| archive-url=https://web.archive.org/web/20181120084622/https://www.flytap.com/en-pt/| archive-date=November 20, 2018| url-status=live}}</ref>
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| [[Turkish Airlines]] | [[Istanbul Airport|Istanbul]] | <ref>{{cite web|url=https://www.turkishairlines.com/en-us/flights/|title=Online Flight Schedule|publisher=Turkish Airlines|access-date=April 8, 2019|archive-url=https://web.archive.org/web/20190410174518/https://www.turkishairlines.com/en-us/flights/|archive-date=April 10, 2019|url-status=live}}</ref>
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| [[United Airlines]] | [[Albany International Airport|Albany]], [[Albuquerque International Sunport|Albuquerque]], [[Amsterdam Airport Schiphol|Amsterdam]], [[Queen Beatrix International Airport|Aruba]], [[Hartsfield–Jackson Atlanta International Airport|Atlanta]], [[Austin–Bergstrom International Airport|Austin]], [[Baltimore/Washington International Airport|Baltimore]], [[Logan International Airport|Boston]], [[Bozeman Yellowstone International Airport|Bozeman]], [[Brussels Airport|Brussels]], [[Buffalo Niagara International Airport|Buffalo]], [[Burlington International Airport|Burlington (VT)]], [[Calgary International Airport|Calgary]], [[Cancún International Airport|Cancún]], [[Eastern Iowa Airport|Cedar Rapids/Iowa City]], [[Charleston International Airport|Charleston (SC)]], [[Charlotte Douglas International Airport|Charlotte]], [[Cincinnati/Northern Kentucky International Airport|Cincinnati]], [[Cleveland Hopkins International Airport|Cleveland]], [[John Glenn Columbus International Airport|Columbus–Glenn]], [[Dallas Fort Worth International Airport|Dallas/Fort Worth]], [[Denver International Airport|Denver]], [[Des Moines International Airport|Des Moines]], [[Detroit Metropolitan Airport|Detroit]], [[Dublin Airport|Dublin]],<ref>{{Cite web |title=United signals 50% hike in Dublin transatlantic capacity |url=https://travelweekly.co.uk/news/united-signals-50-hike-in-dublin-transatlantic-capacity |access-date=2025-06-20 |website=Travel Weekly |language=En}}</ref> [[Eugene Airport|Eugene]] (resumes April 30, 2026),<ref>{{Cite web |title=United Spring 2026 Chicago Domestic Network Expansion |url=https://www.aeroroutes.com/eng/251024-uans26ord |access-date=2025-10-24 |website=Aeroroutes |language=En}}</ref> [[Fort Lauderdale–Hollywood International Airport|Fort Lauderdale]], [[Southwest Florida International Airport|Fort Myers]], [[Frankfurt Airport|Frankfurt]], [[Gerald R. Ford International Airport|Grand Rapids]], [[La Aurora International Airport|Guatemala City]], [[Harrisburg International Airport|Harrisburg]], [[Bradley International Airport|Hartford]], [[Daniel K. Inouye International Airport|Honolulu]], [[George Bush Intercontinental Airport|Houston–Intercontinental]], [[Jacksonville International Airport|Jacksonville (FL)]], [[Kahului Airport|Kahului]], [[Kansas City International Airport|Kansas City]], [[Harry Reid International Airport|Las Vegas]], [[Heathrow Airport|London–Heathrow]], [[Los Angeles International Airport|Los Angeles]], [[Dane County Regional Airport|Madison]], [[Memphis International Airport|Memphis]], [[Mexico City International Airport|Mexico City]], [[Miami International Airport|Miami]], [[Minneapolis–Saint Paul International Airport|Minneapolis/St. Paul]], [[Sangster International Airport|Montego Bay]], [[Munich Airport|Munich]], [[Nashville International Airport|Nashville]], [[Louis Armstrong New Orleans International Airport|New Orleans]], [[LaGuardia Airport|New York–LaGuardia]], [[Newark Liberty International Airport|Newark]], [[Norfolk International Airport|Norfolk]], [[Eppley Airfield|Omaha]], [[Ontario International Airport|Ontario]],<ref name="A to Z">Velani, Bhavya [https://aviationa2z.com/index.php/2025/01/31/united-airlines-three-new-routes-from-chicago/ United Airlines Adds Three New Routes from Chicago], ''Aviation A to Z'', January 31, 2025, retrieved 2025-01-31</ref> [[John Wayne Airport|Orange County (CA)]], [[Orlando International Airport|Orlando]], [[Charles de Gaulle Airport|Paris–Charles de Gaulle]], [[Pensacola International Airport|Pensacola]], [[Philadelphia International Airport|Philadelphia]], [[Phoenix Sky Harbor International Airport|Phoenix–Sky Harbor]], [[Pittsburgh International Airport|Pittsburgh]], [[Portland International Jetport|Portland (ME)]], [[Portland International Airport|Portland (OR)]], [[Licenciado Gustavo Díaz Ordaz International Airport|Puerto Vallarta]], [[Punta Cana International Airport|Punta Cana]], [[Raleigh–Durham International Airport|Raleigh/Durham]], [[Reno–Tahoe International Airport|Reno/Tahoe]], [[Richmond International Airport|Richmond]], [[Greater Rochester International Airport|Rochester (NY)]], [[Sacramento International Airport|Sacramento]], [[St. Louis Lambert International Airport|St. Louis]], [[Salt Lake City International Airport|Salt Lake City]], [[San Antonio International Airport|San Antonio]], [[San Diego International Airport|San Diego]], [[San Francisco International Airport|San Francisco]], [[San Jose Mineta International Airport|San Jose (CA)]], [[Los Cabos International Airport|San José del Cabo]], [[Luis Muñoz Marín International Airport|San Juan]], [[São Paulo/Guarulhos International Airport|São Paulo–Guarulhos]], [[Sarasota–Bradenton International Airport|Sarasota]], [[Savannah/Hilton Head International Airport|Savannah]], [[Seattle/Tacoma International Airport|Seattle/Tacoma]], [[Sioux Falls Regional Airport|Sioux Falls]], [[Syracuse Hancock International Airport|Syracuse]], [[Tampa International Airport|Tampa]], [[Ben Gurion Airport|Tel Aviv]],<ref>{{cite web |last1=Wrobel |first1=Sharon |title=United to resume flights from Chicago and Washington, D.C. to Tel Aviv |url=https://www.timesofisrael.com/liveblog_entry/united-to-resume-flights-from-chicago-and-washington-d-c-to-tel-aviv/ |website=The Times Of Israel |publisher=The Times Of Israel |access-date=4 September 2025}}</ref> [[Haneda Airport|Tokyo–Haneda]], [[Toronto Pearson International Airport|Toronto–Pearson]], [[Cherry Capital Airport|Traverse City]], [[Vancouver International Airport|Vancouver]], [[Dulles International Airport|Washington–Dulles]], [[Ronald Reagan Washington National Airport|Washington–National]], [[Wichita Dwight D. Eisenhower National Airport|Wichita]], [[Zurich Airport|Zurich]]<ref name=UnitedSeasonal2></ref><br />'''Seasonal:''' [[Ted Stevens Anchorage International Airport|Anchorage]],{{cn|date=May 2025}} [[Athens International Airport|Athens]],<ref name=UALATH>{{cite web|url=https://liveandletsfly.com/united-airlines-chicago-athens/|title=United Airlines Adds Chicago – Athens Service|language=English|date=January 24, 2024|accessdate=January 24, 2024}}</ref> [[Josep Tarradellas Barcelona–El Prat Airport|Barcelona]],<ref name=UnitedSeasonal>{{Cite web |title=United NS25 Intercontinental Service Changes – 02MAR25 |url=https://www.aeroroutes.com/eng/250303-uans25inc |access-date=2025-06-27 |website=AeroRoutes |language=en-CA}}</ref> [[Philip S. W. Goldson International Airport|Belize City]],{{cn|date=May 2025}} [[Boise Airport|Boise]],{{cn|date=May 2025}} [[City of Colorado Springs Municipal Airport|Colorado Springs]],{{cn|date=May 2025}} [[Cozumel International Airport|Cozumel]],{{cn|date=May 2025}} [[Dayton International Airport|Dayton]],<ref name=UnitedML>{{cite web|title=United 2H25 A319/737-700 North America Network Additions|url=https://www.aeroroutes.com/eng/250617-ua2h2531973g|date=June 17, 2025|access-date=June 18, 2025}}</ref> [[Eagle County Regional Airport|Eagle/Vail]],{{cn|date=May 2025}} [[Edinburgh Airport|Edinburgh]],{{cn|date=May 2025}} [[Edmonton International Airport|Edmonton]],<ref>{{cite web |title=United Resumes 2 Edmonton Routes From late-May 2025 |url=https://www.aeroroutes.com/eng/241125-uamay25yeg |website=Aeroroutes |access-date=25 November 2024}}</ref> [[Fairbanks International Airport|Fairbanks]],{{cn|date=May 2025}} [[Fresno Yosemite International Airport|Fresno]],{{cn|date=May 2025}} [[Glacier Park International Airport|Glacier Park/Kalispell]],{{cn|date=May 2025}} [[Owen Roberts International Airport|Grand Cayman]],{{cn|date=May 2025}} [[Greenville–Spartanburg International Airport|Greenville/Spartanburg]],{{cn|date=May 2025}} [[Yampa Valley Airport|Hayden/Steamboat Springs]],{{cn|date=May 2025}} [[Indianapolis International Airport|Indianapolis]],{{cn|date=May 2025}} [[Ixtapa-Zihuatanejo International Airport|Ixtapa/Zihuatanejo]],{{cn|date=May 2025}} [[Jackson Hole Airport|Jackson Hole]],{{cn|date=May 2025}} [[Kona International Airport|Kailua-Kona]],{{cn|date=May 2025}} [[Key West International Airport|Key West]],{{cn|date=May 2025}} [[McGhee Tyson Airport|Knoxville]],{{cn|date=May 2025}} [[Guanacaste Airport|Liberia (CR)]],{{cn|date=May 2025}} [[Milan Malpensa Airport|Milan–Malpensa]],<ref name=UnitedSeasonal/> [[Missoula International Airport|Missoula]],{{cn|date=May 2025}} [[Monterey Regional Airport|Monterey]] (begins May 23, 2026),<ref name="UALMRY">{{cite web |title=United Airlines announces seasonal nonstop service between Monterey and Chicago |url=https://www.montereyairport.com/press-release/united-airlines-announces-seasonal-nonstop-service-between-monterey-and-chicago |website=Monterey Regional Airport |access-date=29 October 2025}}</ref>[[Montréal–Trudeau International Airport|Montréal–Trudeau]],<ref>{{cite web|url=https://www.flighta,ware.com/live/flight/UAL587|title=United 587 Flight Details|publisher=flightaware.com|access-date=June 5, 2025}}</ref> [[Montrose Regional Airport|Montrose]],{{cn|date=May 2025}} [[Myrtle Beach International Airport|Myrtle Beach]],{{cn|date=May 2025}} [[Lynden Pindling International Airport|Nassau]],{{cn|date=May 2025}} [[Palm Springs International Airport|Palm Springs]],{{cn|date=May 2025}} [[Northwest Florida Beaches International Airport|Panama City (FL)]],{{cn|date=May 2025}} [[Rhode Island T. F. Green International Airport|Providence]],{{cn|date=May 2025}} [[Providenciales International Airport|Providenciales]],{{cn|date=May 2025}} [[Rapid City Regional Airport|Rapid City]],{{cn|date=May 2025}} [[Keflavík International Airport|Reykjavík–Keflavík]],<ref name=UnitedSeasonal/> [[Rome Fiumicino Airport|Rome–Fiumicino]],<ref name=UnitedSeasonal2>{{Cite web |title=United NW25 Intercontinental Network Changes – 27APR25 |url=https://www.aeroroutes.com/eng/250429-uanw25inc |access-date=2025-06-27 |website=AeroRoutes |language=en-CA}}</ref> [[Hewanorra International Airport|St. Lucia–Hewanorra]],{{cn|date=May 2025}} [[Princess Juliana International Airport|St. Maarten]],{{cn|date=May 2025}} [[Cyril E. King Airport|St. Thomas]],{{cn|date=May 2025}} [[Juan Santamaría International Airport|San José (CR)]],{{cn|date=May 2025}} [[Shannon Airport|Shannon]],<ref name=UnitedSeasonal/> [[Tucson International Airport|Tucson]],{{cn|date=May 2025}} [[Palm Beach International Airport|West Palm Beach]],{{cn|date=May 2025}} |
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| [[United Express]] | [[Akron–Canton Airport|Akron/Canton]], [[Albany International Airport|Albany]], [[Lehigh Valley International Airport|Allentown]], [[Appleton International Airport|Appleton]], [[Asheville Regional Airport|Asheville]], [[Billings Logan International Airport|Billings]],<ref name="A to Z"/> [[Birmingham–Shuttlesworth International Airport|Birmingham (AL)]], [[Boise Airport|Boise]], [[Buffalo Niagara International Airport|Buffalo]], [[Eastern Iowa Airport|Cedar Rapids/Iowa City]], [[Charleston International Airport|Charleston (SC)]], [[Yeager Airport|Charleston (WV)]], [[Charlottesville–Albemarle Airport|Charlottesville (VA)]], [[Chattanooga Metropolitan Airport|Chattanooga]], [[Cincinnati/Northern Kentucky International Airport|Cincinnati]], [[Cleveland Hopkins International Airport|Cleveland]], [[Colorado Springs Airport|Colorado Springs]], [[Columbia Regional Airport|Columbia (MO)]],<ref>{{Cite web|title=United sets service to COU to resume|url=https://www.komu.com/news/midmissourinews/united-airlines-returning-to-cou-with-flights-to-denver-chicago/article_1b3692a9-12a5-4c2e-9b67-1a4c45454b46.html}}</ref> [[Columbia Metropolitan Airport|Columbia (SC)]], [[John Glenn Columbus International Airport|Columbus–Glenn]], [[Dayton International Airport|Dayton]], [[Decatur Airport|Decatur]], [[Des Moines International Airport|Des Moines]], [[Detroit Metropolitan Wayne County Airport|Detroit]], [[Duluth International Airport|Duluth]], [[Chippewa Valley Regional Airport|Eau Claire]],<ref>{{cite news |last1=Shill |first1=Kristen |title=US DOT chooses SkyWest to service Chippewa Valley Regional Airport |url=https://www.wqow.com/eye-on-eau-claire/us-dot-chooses-skywest-to-service-chippewa-valley-regional-airport/article_3748b128-7072-11ef-954f-6bf57a7fa599.html |access-date=18 March 2025 |work=WQOW |date=11 September 2024}}</ref><ref>{{cite web |title=Volaire Aviation Consulting (SkyWest Start Date) |url=https://www.regulations.gov/document/DOT-OST-2009-0306-0076 |website=Department of Transportation |access-date=18 March 2025}}</ref> [[El Paso International Airport|El Paso]], [[Hector International Airport|Fargo]], [[Northwest Arkansas National Airport|Fayetteville/Bentonville]], [[Bishop International Airport|Flint]], [[Fort Dodge Regional Airport|Fort Dodge]], [[Fort Wayne International Airport|Fort Wayne]], [[Gerald R. Ford International Airport|Grand Rapids]], [[Green Bay–Austin Straubel International Airport|Green Bay]], [[Piedmont Triad International Airport|Greensboro]], [[Greenville–Spartanburg International Airport|Greenville/Spartanburg]], [[Harrisburg International Airport|Harrisburg]], [[Houghton County Memorial Airport|Houghton]], [[Huntsville International Airport|Huntsville]], [[Indianapolis International Airport|Indianapolis]], [[Johnstown–Cambria County Airport|Johnstown (PA)]], [[Joplin Regional Airport|Joplin]], [[Kansas City International Airport|Kansas City]], [[McGhee Tyson Airport|Knoxville]], [[Blue Grass Airport|Lexington]], [[Lincoln Airport (Nebraska)|Lincoln]], [[Clinton National Airport|Little Rock]], [[Louisville Muhammad Ali International Airport|Louisville]], [[Lynchburg Regional Airport|Lynchburg]] (begins March 24, 2026),<ref>{{Cite web |title=United Spring 2026 Chicago Domestic Network Expansion |url=https://www.aeroroutes.com/eng/251024-uans26ord |access-date=2025-10-24 |website=Aeroroutes |language=En}}</ref> [[Dane County Regional Airport|Madison]], [[Marquette Sawyer Regional Airport|Marquette]] (resumes May 21, 2026),<ref>{{Cite web |title=United Spring 2026 Chicago Domestic Network Expansion |url=https://www.aeroroutes.com/eng/251024-uans26ord |access-date=2025-10-24 |website=Aeroroutes |language=En}}</ref> [[Mason City Municipal Airport|Mason City]], [[Memphis International Airport|Memphis]], [[Milwaukee Mitchell International Airport|Milwaukee]], [[Quad Cities International Airport|Moline/Quad Cities]], [[Monterrey International Airport|Monterrey]], [[Montréal–Trudeau International Airport|Montréal–Trudeau]], [[Morgantown Municipal Airport|Morgantown (WV)]],<ref name="SkyWestNews">{{cite web | title=SkyWest to begin flying out of Morgantown in December | website=The Dominion Post | url=https://www.dominionpost.com/2024/09/17/haws-citys-new-air-carrier-to-take-off-this-year/ | ref={{sfnref | The Dominion Post}} | access-date=2024-09-23}}</ref> [[Central Wisconsin Airport|Mosinee/Wausau]] (begins May 21, 2026),<ref>https://www.wsaw.com/2025/10/24/united-return-carrier-cwa-may/ </ref> [[Nashville International Airport|Nashville]], [[Louis Armstrong New Orleans International Airport|New Orleans]], [[Will Rogers World Airport|Oklahoma City]], [[Eppley Airfield|Omaha]], [[Ottawa Macdonald–Cartier International Airport|Ottawa]], [[Barkley Regional Airport|Paducah]] (resumes February 24, 2026),<ref>{{Cite web |title=United Spring 2026 Chicago Domestic Network Expansion |url=https://www.aeroroutes.com/eng/251024-uans26ord |access-date=2025-10-24 |website=Aeroroutes |language=En}}</ref> [[General Wayne A. Downing Peoria International Airport|Peoria]], [[Pittsburgh International Airport|Pittsburgh]], [[Portland International Jetport|Portland (ME)]], [[Rhode Island T. F. Green International Airport|Providence]], [[Richmond International Airport|Richmond]], [[Roanoke–Blacksburg Regional Airport|Roanoke]], [[Rochester International Airport|Rochester (MN)]] (resumes April 30, 2026),<ref>{{Cite web |title=United Spring 2026 Chicago Domestic Network Expansion |url=https://www.aeroroutes.com/eng/251024-uans26ord |access-date=2025-10-24 |website=Aeroroutes |language=En}}</ref> [[Greater Rochester International Airport|Rochester (NY)]], [[MBS International Airport|Saginaw]], [[St. Louis Lambert International Airport|St. Louis]], [[Salina Regional Airport|Salina]], [[Savannah/Hilton Head International Airport|Savannah]], [[Sioux Gateway Airport|Sioux City]], [[Sioux Falls Regional Airport|Sioux Falls]], [[South Bend International Airport|South Bend]], [[Springfield–Branson National Airport|Springfield/Branson]], [[State College Regional Airport|State College]], [[Syracuse Hancock International Airport|Syracuse]], [[Toronto Pearson International Airport|Toronto–Pearson]], [[Cherry Capital Airport|Traverse City]], [[Tucson International Airport|Tucson]], [[Tulsa International Airport|Tulsa]], [[Watertown Regional Airport|Watertown (SD)]],<ref>{{cite web|url=https://kfgo.com/2025/06/05/federal-government-extends-contract-for-air-service-in-watertown-pierre/|title=Federal government extends contract for air service in Watertown, Pierre|website=KFGO|date= June 5, 2025|accessdate=2025-06-06}}</ref> [[Purdue University Airport|West Lafayette]],<ref>{{Cite web|url=https://www.purdueexponent.org/campus/general_news/purdue-skywest-flight-united/article_6baf8abb-697f-41da-9606-aef3f5422285.html|title= Purdue, SkyWest to start new commercial flights to Chicago |website=purdueexponent.org |date= April 4, 2025 |access-date=April 4, 2025}}</ref> [[Wichita Dwight D. Eisenhower National Airport|Wichita]], [[Wilkes-Barre/Scranton International Airport|Wilkes-Barre/Scranton]], [[Winnipeg James Armstrong Richardson International Airport|Winnipeg]]<ref>{{cite web |title=United to resume direct flights between Winnipeg and both Denver, Chicago in May |url=https://www.cbc.ca/news/canada/manitoba/chicago-denver-flights-return-winnipeg-1.7093889|website=CBC News |access-date=January 25, 2024}}</ref> <br />'''Seasonal:''' [[Albuquerque International Sunport|Albuquerque]],{{cn|date=May 2025}} [[Aspen/Pitkin County Airport|Aspen]],{{cn|date=May 2025}} [[Bangor International Airport|Bangor]],{{cn|date=May 2025}} [[Bozeman Yellowstone International Airport|Bozeman]],{{cn|date=May 2025}} [[Burlington International Airport|Burlington (VT)]],{{cn|date=May 2025}} [[Glacier Park International Airport|Glacier Park/Kalispell]],{{cn|date=May 2025}} [[Great Falls International Airport|Great Falls]],{{cn|date=May 2025}} [[Gunnison–Crested Butte Regional Airport|Gunnison/Crested Butte]],<ref>https://www.gunnisontimes.com/articles/guc-adds-flights-from-chicago-this-winter/</ref> [[Halifax Stanfield International Airport|Halifax]],<ref name="A to Z"/> [[Valley International Airport|Harlingen]],<ref>{{cite web | url=https://www.krgv.com/news/aeropuerto-internacional-de-harlingen-anuncia-dos-nuevas-rutas-sin-escala | title=Aeropuerto Internacional de Harlingen anuncia dos nuevas rutas sin escala | date=November 29, 2023 }}</ref> [[Bradley International Airport|Hartford]],{{cn|date=May 2025}} [[Yampa Valley Airport|Hayden/Steamboat Springs]],{{cn|date=May 2025}} [[Hilton Head Airport|Hilton Head]],{{cn|date=May 2025}} [[Idaho Falls Regional Airport|Idaho Falls]] (begins May 23, 2026),<ref>{{Cite web |title=United Spring 2026 Chicago Domestic Network Expansion |url=https://www.aeroroutes.com/eng/251024-uans26ord |access-date=2025-10-24 |website=Aeroroutes |language=En}}</ref> [[Jacksonville International Airport|Jacksonville (FL)]],{{cn|date=May 2025}} [[Key West International Airport|Key West]],{{cn|date=May 2025}} [[Minneapolis–Saint Paul International Airport|Minneapolis/St. Paul]],{{cn|date=May 2025}} [[Montrose Regional Airport|Montrose]],{{cn|date=May 2025}} [[Myrtle Beach International Airport|Myrtle Beach]],{{cn|date=May 2025}} [[Nantucket Memorial Airport|Nantucket]],{{cn|date=May 2025}} [[LaGuardia Airport|New York–LaGuardia]],{{cn|date=May 2025}} [[Norfolk International Airport|Norfolk]],{{cn|date=May 2025}} [[Northwest Florida Beaches International Airport|Panama City (FL)]],{{cn|date=May 2025}} [[Pellston Regional Airport|Pellston]],<ref name=UAL25 /> [[Québec City Jean Lesage International Airport|Québec City]],<ref>{{cite web |title=United Resumes Winnipeg and Chicago – Quebec in NS24 |url=https://www.aeroroutes.com/eng/240126-uans24ca |website=Aeroroutes |access-date=January 26, 2024}}</ref> [[Raleigh–Durham International Airport|Raleigh/Durham]],{{cn|date=May 2025}} [[Rapid City Regional Airport|Rapid City]],{{cn|date=May 2025}} [[Rhinelander–Oneida County Airport|Rhinelander]],<ref>{{Cite web |last=Fisher |first=Sadie |date=2024-12-20 |title=Rhinelander-Oneida County Airport announces new seasonal flights to Chicago |url=https://www.waow.com/news/rhinelander-oneida-county-airport-announces-new-seasonal-flights-to-chicago/article_b542a41a-beda-11ef-8378-4f87c8ac0178.html |access-date=2024-12-20 |website=WAOW |language=en}}</ref> [[Salt Lake City International Airport|Salt Lake City]],{{cn|date=May 2025}} [[San Antonio International Airport|San Antonio]],{{cn|date=May 2025}} [[Chippewa County International Airport|Sault Ste. Marie (MI)]],<ref name=UAL25>{{Cite web |title=United NS25 Domestic Network Changes – 22DEC24 |url=https://www.aeroroutes.com/eng/241227-uans25us |access-date=2024-12-27 |website=AeroRoutes |language=en-CA}}</ref> [[Spokane International Airport|Spokane]],{{cn|date=May 2025}} [[Friedman Memorial Airport|Sun Valley]],{{cn|date=May 2025}} [[Wilmington International Airport|Wilmington (NC)]]<ref>{{cite web |title=United Schedules Additional Seasonal Domestic Routes in NS24 |url=https://www.aeroroutes.com/eng/240219-uans24dom |website=Aeroroutes |access-date=February 19, 2024}}</ref> | <ref name="UnitedRoutes">{{cite web|title=Timetable|url=https://www.united.com/web/en-US/apps/travel/timetable/default.aspx|publisher=United Airlines Holdings|location=Chicago|access-date=March 17, 2018|archive-url=https://web.archive.org/web/20170128165254/https://www.united.com/web/en-US/apps/travel/timetable/default.aspx|archive-date=January 28, 2017|url-status=live}}</ref>
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| [[Viva (airline)|Viva]] | [[Guadalajara International Airport|Guadalajara]], [[Bajío International Airport|León/Del Bajío]], [[Mexico City International Airport|Mexico City]], [[Monterrey International Airport|Monterrey]], [[General Francisco Mujica International Airport|Morelia]] | <ref name="VivaAerobus Routes">{{cite web|title=VivaAerobus Flight Schedule|url=https://www.vivaaerobus.com/en|access-date=August 16, 2019|archive-url=https://web.archive.org/web/20180405152831/https://www.vivaaerobus.com/en|archive-date=April 5, 2018|url-status=live}}</ref>
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| [[Volaris]] | [[Guadalajara International Airport|Guadalajara]], [[Bajío International Airport|León/Del Bajío]], [[Mexico City International Airport|Mexico City]], [[General Francisco Mujica International Airport|Morelia]], [[Querétaro Intercontinental Airport|Querétaro]] | <ref>{{cite web |title=Volaris updated scheduled flights from Chicago |url= https://airlinesmap.com/airlines/Y4/ord|publisher=airlinesmap.com |date=July 21, 2025 |access-date=July 21, 2025}}</ref>
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| [[WestJet]] | '''Seasonal:''' [[Calgary International Airport|Calgary]],<ref>{{OAGWorldJuly2025Ref|title=Calgary, AB, Canada YYC|pages=204-206}}</ref> [[Edmonton International Airport|Edmonton]]<ref>{{OAGWorldJuly2025Ref|title=Edmonton, AB, Canada YEA|pages=373-374}}</ref><ref>{{cite web |title=WestJet July/August 2025 US Service Reductions – 04MAY25 |url=https://www.aeroroutes.com/eng/250504-ws3q25us |website=Aeroroutes |access-date=4 May 2025}}</ref> | <ref>{{cite web |title=WestJet boosts cross-border and domestic connectivity in Calgary |url= https://www.aviacionline.com/westjet-boosts-cross-border-and-domestic-connectivity-in-calgary|publisher=Aviacionline.com |date=February 14, 2023 |access-date=February 11, 2024}}</ref>
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}}

===Cargo===
{{Airport destination list | 3rdcoltitle = Refs | 3rdcolunsortable=yes
| [[AeroLogic]] | [[Frankfurt Airport|Frankfurt]] | 
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| [[AirBridgeCargo]] | [[Dallas/Fort Worth International Airport|Dallas/Fort Worth]], [[Houston–Intercontinental]], [[Luxembourg Airport|Luxembourg]] (all suspended) | <ref>{{cite web|title=Our Network|url=http://www.airbridgecargo.com/en/page/29/our-network|access-date=September 12, 2017|archive-url=https://web.archive.org/web/20170913044440/http://www.airbridgecargo.com/en/page/29/our-network|archive-date=September 13, 2017|url-status=live}}</ref>
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| [[Air Canada Cargo]] | [[Toronto Pearson International Airport|Toronto–Pearson]] | <ref>{{cite web|url=https://www.freightweek.org/index.php/en/latest-news/8285-air-canada-cargo-adds-freighter-service-to-chicago|title=Air Canada Cargo adds freighter service to Chicago|publisher=Freight Week|date=April 23, 2024|accessdate=April 24, 2024}}</ref>
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| [[Air China Cargo]] | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Beijing–Capital]], [[Frankfurt Airport|Frankfurt]], [[New York–JFK]], [[Shanghai Pudong International Airport|Shanghai–Pudong]], [[Tianjin Binhai International Airport|Tianjin]] | 
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| [[Air France Cargo]] | [[Dublin Airport|Dublin]], [[Glasgow Prestwick Airport|Glasgow–Prestwick]], [[New York–JFK]], [[Paris–Charles de Gaulle]] | 
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| [[All Nippon Airways|ANA Cargo]] | [[Tokyo–Narita]] | <ref>{{cite web |url=https://www.aviationwire.jp/archives/188724 |title=ANAカーゴの777F、成田－シカゴ就航 初の北米路線 |access-date=January 2, 2020 |archive-date=December 11, 2019 |archive-url=https://web.archive.org/web/20191211183602/https://www.aviationwire.jp/archives/188724 |url-status=live }}</ref>
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| [[ASL Airlines Belgium]] | [[Liège Airport|Liège]] | 
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| [[Atlas Air]] | [[Amsterdam Airport Schiphol|Amsterdam]], [[Ted Stevens Anchorage International Airport|Anchorage]], [[Cincinnati/Northern Kentucky International Airport|Cincinnati]], [[Dallas Fort Worth International Airport|Dallas/Fort Worth]], [[Frankfurt Airport|Frankfurt]], [[Hong Kong International Airport|Hong Kong]], [[Daniel K. Inouye International Airport|Honolulu]], [[Los Angeles International Airport|Los Angeles]], [[Liège Airport|Liège]], [[Miami International Airport|Miami]], [[Milan–Malpensa]], [[New York–JFK]], [[Incheon International Airport|Seoul–Incheon]], [[Stuttgart Airport|Stuttgart]], [[Tokyo–Narita]] | <ref>{{cite web|title=Atlas Air Schedule|url=http://jumpseat.atlasair.com/travel/schedule.asp|website=[[Atlas Air]]|access-date=December 18, 2023|archive-date=August 13, 2023|archive-url=https://web.archive.org/web/20230813134854/http://jumpseat.atlasair.com/travel/schedule.asp|url-status=dead}}</ref>
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| [[Avianca Cargo México]] | [[Felipe Ángeles International Airport|Mexico City–AIFA]] | 
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| [[Cargolux]] | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Hartsfield–Jackson Atlanta International Airport|Atlanta]], [[Dallas/Fort Worth International Airport|Dallas/Fort Worth]], [[Hong Kong International Airport|Hong Kong]], [[Indianapolis International Airport|Indianapolis]], [[Kuala Lumpur–International]], [[Los Angeles International Airport|Los Angeles]], [[Luxembourg Airport|Luxembourg]], [[New York–JFK]], [[Changi Airport|Singapore]], [[Zhengzhou Xinzheng International Airport|Zhengzhou]] | 
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| [[Cathay Cargo]] | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Hong Kong International Airport|Hong Kong]], [[New York–JFK]], [[Portland International Airport|Portland (OR)]] | 
<!-- -->
| [[China Airlines Cargo]] | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Houston–Intercontinental]], [[Chubu Centrair International Airport|Nagoya–Centrair]], [[San Francisco International Airport|San Francisco]], [[Seattle/Tacoma]], [[Taipei–Taoyuan]] | 
<!-- -->
| [[China Cargo Airlines]] | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Hartsfield–Jackson Atlanta International Airport|Atlanta]], [[Dallas/Fort Worth International Airport|Dallas/Fort Worth]], [[Shanghai Pudong International Airport|Shanghai–Pudong]] | 
<!-- -->
| [[China Southern Airlines|China Southern Cargo]] | [[Guangzhou Baiyun International Airport|Guangzhou]], [[Shanghai Pudong International Airport|Shanghai–Pudong]] | <ref>{{cite web|url=http://www.csnva.org/our-routes.html |title=China Southern Cargo Schedule |access-date=March 28, 2013 |url-status=dead |archive-url=https://web.archive.org/web/20140119045603/http://www.csnva.org/our-routes.html |archive-date=January 19, 2014}}</ref>
<!-- -->
| [[DHL Aviation]] | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Calgary International Airport|Calgary]], [[Cincinnati/Northern Kentucky International Airport|Cincinnati]], [[Newark Liberty International Airport|Newark]], [[New York–JFK]] | 
<!-- -->
| [[Emirates SkyCargo]] | [[Copenhagen Airport|Copenhagen]], [[Al Maktoum International Airport|Dubai–Al Maktoum]], [[Maastricht Aachen Airport|Maastricht/Aachen]], [[Miami International Airport|Miami]] | <ref>{{cite web |url=http://www.skycargo.com/english/about-us/our-network/routemap.aspx |title=SkyCargo Route Map |website=Emirates SkyCargo |access-date=May 9, 2013 |archive-url=https://web.archive.org/web/20130216065220/http://www.skycargo.com/english/about-us/our-network/routemap.aspx |archive-date=February 16, 2013 |url-status=live }}</ref>
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| [[Etihad Cargo]] | [[Frankfurt Airport|Frankfurt]] | <ref>{{cite web|url=https://www.wfs.aero/our-services-etihad-cargo-enhances-us-cool-chain-capabilities-with-wfs-partnership/ |title=Our Services: Etihad Cargo Enhances US cool Chain Capabilities with WFS Partnership |date=October 18, 2023 |access-date=June 10, 2024 }}</ref>
<!-- -->
| [[EVA Air Cargo]] | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Dallas/Fort Worth International Airport|Dallas/Fort Worth]], [[Taipei–Taoyuan]] | 
<!-- -->
| [[FedEx Express]] | 
[[Appleton International Airport|Appleton]], [[Fort Worth Alliance Airport|Fort Worth/Alliance]], [[Piedmont Triad International Airport|Greensboro]], [[Indianapolis International Airport|Indianapolis]], [[Los Angeles International Airport|Los Angeles]], [[Memphis International Airport|Memphis]], [[Milwaukee Mitchell International Airport|Milwaukee]], [[Newark Liberty International Airport|Newark]], [[Oakland International Airport|Oakland]], [[Eppley Airfield|Omaha]], [[Pittsburgh International Airport|Pittsburgh]], [[Portland International Airport|Portland (OR)]], [[Seattle/Tacoma]] | 
<!-- -->
| [[Korean Air|Korean Air Cargo]] | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Halifax Stanfield International Airport|Halifax]], [[Los Angeles International Airport|Los Angeles]], [[San Francisco International Airport|San Francisco]], [[Seattle/Tacoma]], [[Incheon International Airport|Seoul–Incheon]], [[Toronto–Pearson]] | 
<!-- -->
| [[LATAM Cargo Chile]] | [[Viracopos International Airport|Campinas]] | <ref>{{cite web |title=City of Chicago Welcomes LATAM Cargo to O'Hare International Airport |url=https://www.flychicago.com/business/media/news/pages/article.aspx?newsid=1529 |website=flychicago.com |publisher=Chicago Department of Aviation |access-date=February 26, 2019 |archive-url=https://web.archive.org/web/20190227060711/https://www.flychicago.com/business/media/news/pages/article.aspx?newsid=1529 |archive-date=February 27, 2019 |url-status=live }}</ref>
<!-- -->
| [[LOT Polish Airlines]] | [[Warsaw–Chopin]] | 
<!-- -->
| [[Lufthansa Cargo]] | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Hartsfield–Jackson Atlanta International Airport|Atlanta]], [[Frankfurt Airport|Frankfurt]], [[Guadalajara International Airport|Guadalajara]], [[Los Angeles International Airport|Los Angeles]], [[Manchester Airport|Manchester (UK)]], [[Felipe Ángeles International Airport|Mexico City–AIFA]], [[New York–JFK]] | <ref>{{cite press release |first=Łukasz |last=Malinowski |title=Cargo Jet i PLL LOT Cargo uruchomiły trasę z Pyrzowic do Chicago |trans-title=Jet Cargo and LOT Polish Airlines Cargo Has Launched a Route from Katowice to Chicago |language=pl |url=http://www.rynekinfrastruktury.pl/artykul/55/1/cargo-jet-i-pll-lot-cargo-uruchomily-trase-z-pyrzowic-do-chicago.html |publisher=Katowice International Airport |date=February 14, 2012 |access-date=July 15, 2012 |archive-url=https://web.archive.org/web/20130801090027/http://www.rynekinfrastruktury.pl/artykul/55/1/cargo-jet-i-pll-lot-cargo-uruchomily-trase-z-pyrzowic-do-chicago.html |archive-date=August 1, 2013 |url-status=live }}</ref>
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| [[Martinair]] | [[Oslo Airport, Gardermoen|Oslo]] | 
<!-- -->
| [[MSC Air Cargo]] | [[Indianapolis International Airport|Indianapolis]], [[Liège Airport|Liège]] | <ref>{{cite web | url=https://www.msc.com/en/solutions/air-cargo-solution/business-hub/air-cargo-schedule | title=Air cargo schedule }}</ref>
<!-- -->
| [[Nippon Cargo Airlines]] | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Dallas/Fort Worth International Airport|Dallas/Fort Worth]], [[Edmonton International Airport|Edmonton]], [[Los Angeles International Airport|Los Angeles]], [[New York–JFK]] | <ref>{{cite web |title=The customized AeroLogic network |url=http://www.aerologic.aero/network |website=Aero Logic |access-date=August 13, 2013 |archive-url=https://web.archive.org/web/20130808224442/http://aerologic.aero/network |archive-date=August 8, 2013 |url-status=live }}</ref><ref>{{cite web |url=http://globalnews.ca/news/3663253/edmonton-adds-to-cargo-load-with-a-regular-flight-to-tokyo/ |title=Edmonton adds to cargo load with a regular flight to Tokyo – Edmonton |publisher=Globalnews.ca |date=August 14, 2017 |access-date=March 16, 2018 |archive-url=https://web.archive.org/web/20170819092242/http://globalnews.ca/news/3663253/edmonton-adds-to-cargo-load-with-a-regular-flight-to-tokyo/ |archive-date=August 19, 2017 |url-status=live }}</ref>
<!-- -->
| [[Qantas Freight]] | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Auckland Airport|Auckland]], [[Chongqing Jiangbei International Airport|Chongqing]], [[Daniel K. Inouye International Airport|Honolulu]], [[Los Angeles International Airport|Los Angeles]], [[Melbourne Airport|Melbourne]], [[Sydney Airport|Sydney]] | <ref>{{cite map |title=Qantas Freight International Network Map |publisher=Qantas Freight |url=http://www.qantas.com.au/cargo/pdf/FreightNetworkMap.pdf |format=PDF |access-date=September 1, 2015 |url-status=dead |archive-url=https://web.archive.org/web/20150924083444/http://www.qantas.com.au/cargo/pdf/FreightNetworkMap.pdf |archive-date=September 24, 2015 }}</ref><ref name="info.flightmapper.net">{{cite web |url=http://info.flightmapper.net/flight/Qantas_QF_7552 |title=Qantas flight QF 7552 schedule |website=Info.flightmapper.net |date=April 27, 2016 |access-date=April 27, 2016 |archive-url=https://web.archive.org/web/20151116154030/http://info.flightmapper.net/flight/Qantas_QF_7552 |archive-date=November 16, 2015 |url-status=live }}</ref><ref>{{cite news |title=Qantas Freight Launches Chongqing Route |url=http://aircargoworld.com/qantas-freight-launches-chongqing-route/ |work=Air Cargo World |date=April 19, 2012 |access-date=July 15, 2012 |archive-url=https://web.archive.org/web/20150925094727/http://aircargoworld.com/qantas-freight-launches-chongqing-route/ |archive-date=September 25, 2015 |url-status=live }}</ref><ref>{{cite web |title=Qantas Freighter Network Northern Summer Schedule 2010 |url=http://www.qantas.com.au/freight/pdf/QFFreighterscheduleJune2010.pdf |website=Qantas Freight |date=June 2010|access-date=July 15, 2012|archive-url=https://web.archive.org/web/20101230000848/http://www.qantas.com.au/freight/pdf/QFFreighterscheduleJune2010.pdf|archive-date=December 30, 2010}}</ref>
<!-- -->
| [[Qatar Airways|Qatar Airways Cargo]] | [[Amsterdam Airport Schiphol|Amsterdam]], [[Brussels Airport|Brussels]], [[Hamad International Airport|Doha]], [[Los Angeles International Airport|Los Angeles]], [[Milan–Malpensa]], [[Ostend–Bruges International Airport|Ostend/Bruges]],<ref>{{cite web|url=https://www.aviation24.be/airports/ostend-bruges/officially-added-to-qatar-airways-cargo-network/|title=Ostend-Bruges Airport officially added to Qatar Airways Cargo Network|first=Bart|last=Noëth|date=May 31, 2021|access-date=June 2, 2021|archive-date=June 2, 2021|archive-url=https://web.archive.org/web/20210602214231/https://www.aviation24.be/airports/ostend-bruges/officially-added-to-qatar-airways-cargo-network/|url-status=live}}</ref> [[Changi Airport|Singapore]] | <ref>{{cite web|title=Qatar Airways to Begin Chicago Freighter Service |url=http://www.ameinfo.com/239240.html |work=AMEinfo |date=August 2, 2010 |access-date=November 3, 2010 |url-status=dead |archive-url=https://web.archive.org/web/20100803064848/http://www.ameinfo.com/239240.html |archive-date=August 3, 2010}}</ref><ref>{{cite news |title=Qatar Airways to begin Chicago freighter service |work=Air Cargo News |url=http://www.aircargonews.net/news/single-view/news/qatar-airways-to-begin-chicago-freighter-service.html |date=August 10, 2010 |access-date=September 1, 2015 |archive-url=https://web.archive.org/web/20150925050718/http://www.aircargonews.net/news/single-view/news/qatar-airways-to-begin-chicago-freighter-service.html |archive-date=September 25, 2015 |url-status=live }}</ref><ref>{{cite news |url=http://www.joc.com/air-cargo/cargo-airlines/qatar-airways/qatar-airways-start-milan-chicago-freighter-service_20130606.html |title=Qatar Airways to Start Milan-Chicago Freighter Service |work=[[The Journal of Commerce]] |date=June 6, 2013 |access-date=June 29, 2013 |archive-url=https://web.archive.org/web/20131103200757/http://www.joc.com/air-cargo/cargo-airlines/qatar-airways/qatar-airways-start-milan-chicago-freighter-service_20130606.html |archive-date=November 3, 2013 |url-status=live }}</ref><ref>{{cite web |title=Qatar Airways Cargo Announces Inclusion of Singapore on its Popular Transpacific Freighter Route |url=https://www.qatarairways.com/en/press-releases/2019/July/SIN777F.html |website=Qatar Airways |date=July 16, 2019 |access-date=October 3, 2020 |archive-date=December 28, 2020 |archive-url=https://web.archive.org/web/20201228055750/https://www.qatarairways.com/en/press-releases/2019/July/SIN777F.html |url-status=live }}</ref>
<!-- -->
| [[Silk Way Airlines]] | [[Heydar Aliyev International Airport|Baku]] | <ref>{{cite web |title=Silk Way Launches Direct Flights to Chicago |url=http://www.aviationpros.com/news/12260892/silk-way-west-airlines-launches-direct-flights-to-chicago |access-date=October 2, 2016 |date=September 23, 2016 |url-status=dead |archive-url=https://web.archive.org/web/20161001041826/http://www.aviationpros.com/news/12260892/silk-way-west-airlines-launches-direct-flights-to-chicago |archive-date=October 1, 2016 }}</ref>
<!-- -->
|{{nowrap|[[Singapore Airlines Cargo]]}} | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Hartsfield–Jackson Atlanta International Airport|Atlanta]], [[Brussels Airport|Brussels]], [[Dallas/Fort Worth International Airport|Dallas/Fort Worth]], [[Los Angeles International Airport|Los Angeles]], [[Seattle/Tacoma]] | <ref>{{cite web |title=Singapore Airlines Cargo |url=http://www.siacargo.com/FPSearch.aspx |website=Singapore Airlines Cargo |access-date=June 10, 2013 |date=September 2015 |url-status=dead |archive-url=https://web.archive.org/web/20130517195359/http://www.siacargo.com/fpsearch.aspx |archive-date=May 17, 2013}}</ref>
<!-- -->
| [[Suparna Airlines]] | [[Ted Stevens Anchorage International Airport|Anchorage]], [[Shanghai Pudong International Airport|Shanghai–Pudong]] | 
<!-- -->
| [[Turkish Cargo]] | [[Istanbul Airport|Istanbul]], [[Maastricht Aachen Airport|Maastricht/Aachen]], [[Shannon Airport|Shannon]], [[Toronto–Pearson]] | <ref>{{cite news |title=Turkish freighter goes to Chicago |url=http://www.aircargonews.net/en/news/airlines/freighter/single-view/news/turkish-freighter-goes-to-chicago.html |work=Air Cargo News |date=April 7, 2015 |access-date=April 12, 2015 |archive-url=https://web.archive.org/web/20150701232251/http://www.aircargonews.net/en/news/airlines/freighter/single-view/news/turkish-freighter-goes-to-chicago.html |archive-date=July 1, 2015 |url-status=dead}}</ref><ref>{{cite web |url=https://www.routesonline.com/news/38/airlineroute/276359/turkish-cargo-adds-7-destinations-in-jan-2018/ |title=Turkish Airlines Cargo added new destinations from 2018 |publisher=Routesonline.com |access-date=March 16, 2018 |archive-url=https://web.archive.org/web/20171222221644/https://www.routesonline.com/news/38/airlineroute/276359/turkish-cargo-adds-7-destinations-in-jan-2018/ |archive-date=December 22, 2017 |url-status=live }}</ref>
<!-- -->
| [[UPS Airlines]] | [[Cologne Bonn Airport|Cologne/Bonn]], [[Rickenbacker International Airport|Columbus–Rickenbacker]], [[Dallas/Fort Worth International Airport|Dallas/Fort Worth]], [[Louisville Muhammad Ali International Airport|Louisville]], [[Miami International Airport|Miami]], [[Philadelphia International Airport|Philadelphia]], [[Portland International Airport|Portland (OR)]] | 
}}

==Statistics==

===Top destinations===
{{table alignment}}
{| class="wikitable sortable col3right" style="font-size: 95%;"
|+ Busiest domestic routes from ORD<!-- BTS DATA IS ONLY FOR DESTINATIONS; THIS IS NOT "TO AND FROM" --> (January 2024 – December 2024)<ref name="Chicago_BTS">{{cite web |title=Chicago, IL: O'Hare (ORD) |url=https://www.transtats.bts.gov/airports.asp?20=E&Nv42146=beQ&Nv42146_anzr=Puvpnt1,%20VY:%20Puvpnt1%20b%26%23146%3BUn4r%20V06r40n6v10ny&pn44vr4=SNPgf |website=[[Bureau of Transportation Statistics]] |publisher=U.S. Department of Transportation |access-date=March 17, 2025}}</ref>
|-
! Rank
! Airport
! Passengers
! Carriers
|-
| 1
| {{flagicon|New York (state)}} [[LaGuardia Airport|New York–LaGuardia, New York]]
| 1,315,000	
| American, Delta, Spirit, United
|-
| 2
| {{flagicon|California}} [[Los Angeles International Airport|Los Angeles, California]]
| 1,171,000	
| American, Spirit, United
|-
| 3
| {{flagicon|Colorado}} [[Denver International Airport|Denver, Colorado]]
| 1,046,000
| American, Frontier, Southwest, United
|-
| 4
| {{flagicon|Texas}} [[Dallas Fort Worth International Airport|Dallas/Fort Worth, Texas]]
| 953,000
| American, Frontier, Spirit, United
|-
| 5
| {{flagicon|California}} [[San Francisco International Airport|San Francisco, California]]
| 932,000
| Alaska, American, United
|-
| 6
| {{flagicon|Arizona}} [[Phoenix Sky Harbor International Airport|Phoenix–Sky Harbor, Arizona]]
| 898,000
| American, Frontier, Southwest, Spirit, United
|-
| 7
| {{flagicon|New Jersey}} [[Newark Liberty International Airport|Newark, New Jersey]]
| 852,000
| American, Spirit, United
|-
| 8
| {{flagicon|Massachusetts}} [[Logan International Airport|Boston, Massachusetts]]
| 845,000
| American, Delta, JetBlue, United
|-
| 9
| {{flagicon|Florida}} [[Orlando International Airport|Orlando, Florida]]
| 813,000
| American, Frontier, Southwest, Spirit, United
|-
| 10
| {{flagicon|Nevada}} [[Harry Reid International Airport|Las Vegas, Nevada]]
| 812,000
| American, Frontier, Southwest, Spirit, United

|}

{| class="wikitable sortable col3right" style="font-size: 95%;"
|+ Busiest international routes from ORD (January 2024 – December 2024)<ref>{{cite web|url=https://data.transportation.gov/Aviation/International_Report_Passengers/xgub-n9bw|date=2024|title=International Report Passengers|work=[[United States Department of Transportation]]|access-date=July 29, 2025|archive-url=https://web.archive.org/web/20190719031853/https://data.transportation.gov/Aviation/International_Report_Passengers/xgub-n9bw|archive-date=July 19, 2019|url-status=live}}</ref><!--Totals calculated in July 2025, using raw data available at source.-->
|-
! Rank
! Airport
! Passengers
! Carriers
|-
| 1
| {{flagicon|United Kingdom}} [[Heathrow Airport|London–Heathrow, United Kingdom]]
| 1,094,460
| American, British Airways, United
|-
| 2
| {{flagicon|Canada}} [[Toronto Pearson International Airport|Toronto–Pearson, Canada]]
| 900,413
| Air Canada, American, United
|-
| 3
| {{flagicon|Mexico}} [[Cancún International Airport|Cancún, Mexico]]
| 874,047
| American, Frontier, Southwest, Spirit, United
|-
| 4
| {{flagicon|Mexico}} [[Mexico City International Airport|Mexico City, Mexico]]
| 718,972
| Aeroméxico, United, Viva, Volaris
|-
| 5
| {{flagicon|Germany}} [[Frankfurt Airport|Frankfurt, Germany]]
| 675,568
| Lufthansa, United
|-
| 6
| {{flagicon|Japan}} [[Haneda Airport|Tokyo–Haneda, Japan]]
| 447,242
| All Nippon Airways, Japan Airlines, United
|-
| 7
| {{flagicon|Germany}} [[Munich Airport|Munich, Germany]]
| 436,877
| Lufthansa, United
|-
| 8
| {{flagicon|France}} [[Charles de Gaulle Airport|Paris–Charles de Gaulle, France]]
| 398,815
| Air France, American, United
|-
| 9
| {{flagicon|Republic of Ireland}} [[Dublin Airport|Dublin, Ireland]]
| 395,813
| Aer Lingus, American, United
|-
| 10
| {{flagicon|Mexico}} [[Guadalajara International Airport|Guadalajara, Mexico]]
| 390,476
| Aeroméxico, Viva, Volaris
|}

===Airline market share===
{{table alignment}}
{| class="wikitable col3right col4right" style="font-size: 95%"
|+Top airlines at ORD (February 2023 – January 2024)<ref name="Chicago_BTS" />
|-
! Rank
! Airline
! Passengers
! Percent of market share
|-
| 1
|[[United Airlines]]
| 23,788,000
| 40.58%
|-
| 2
|[[American Airlines]]
| 13,342,000
| 22.76%
|-
| 3
|[[SkyWest Airlines]]
| 5,447,000
| 9.29%
|-
| 4
| [[Envoy Air]]
| 2,773,000
| 4.73%
|-
| 5
|[[Delta Air Lines]]
| 2,538,000
| 4.42%
|-
| 
|Other
|10,479,000
|18.27%
|}

===Annual traffic===
{{Airport-Statistics|iata=ORD}}
{| class="wikitable sortable" style="font-size: 95%"
|+ Traffic by calendar year<ref>{{cite web| title = Air Traffic Data| url = http://www.flychicago.com/business/CDA/factsfigures/Pages/airtraffic.aspx| website = www.flychicago.com| access-date = March 16, 2023| archive-url = https://web.archive.org/web/20180406230841/http://www.flychicago.com/business/CDA/factsfigures/Pages/airtraffic.aspx| archive-date = April 6, 2018| url-status = live}}</ref>
|-
! style="width:75px"| Year !! style="width:75px"| Passenger volume !! style="width:75px"| Change over previous year !! style="width:75px"| Aircraft operations !! style="width:75px"| Cargo tonnage
|-
!2000
|72,144,244 || {{decrease}}{{0}}0.64% || 908,989 || 1,640,524
|-
!2001
|67,448,064 || {{decrease}}{{0}}6.51% || 911,917 || 1,413,834
|-
!2002
|66,565,952 || {{decrease}}{{0}}1.31% || 922,817 || 1,436,386
|-
!2003
|69,508,672 || {{increase}}{{0}}4.40% || 928,691 || 1,601,736
|-
!2004
|75,533,822 || {{increase}}{{0}}8.67% || '''992,427''' || 1,685,808
|-
!2005
|76,581,146 || {{increase}}{{0}}1.38% || 972,248 || 1,701,446
|-
!2006
|76,282,212 || {{decrease}}{{0}}0.30% || 958,643 || 1,718,011
|-
!2007
|76,182,025 || {{decrease}}{{0}}0.15% || 926,973 || 1,690,742
|-
!2008
|70,819,015 || {{decrease}}{{0}}7.03% || 881,566 || 1,480,847
|-
!2009
|64,397,782 || {{decrease}}{{0}}9.07%|| 827,899 || 1,198,426
|-
!2010
|67,026,191 || {{increase}}{{0}}3.83% || 882,617 || 1,577,048
|-
!2011
|66,790,996 || {{decrease}}{{0}}0.35% || 878,798 || 1,505,218
|-
!2012
|66,834,931 || {{increase}}{{0}}0.04% || 878,108 || 1,443,569
|-
!2013
|66,909,638 || {{increase}}{{0}}0.12% || 883,287 || 1,434,377
|-
!2014
|70,075,204 || {{increase}}{{0}}4.45% || 881,933 || 1,578,330
|-
!2015
|76,949,336 || {{increase}}{{0}}9.81% || 875,136 || 1,742,501
|-
!2016
|77,960,588 || {{increase}}{{0}}1.31% || 867,635 || 1,726,362
|-
!2017
|79,828,183 || {{increase}}{{0}}2.40% || 867,049 || 1,950,137
|-
!2018
|83,339,186<ref name="flychicago.com">{{cite web |url=https://www.flychicago.com/SiteCollectionDocuments/Business/FactAndFigures/AirTraffic/1218%20ORD%20SUMMARY.pdf |title=Year-To-Date Operations, Passengers, Cargo Summary By Class |access-date=April 11, 2019 |archive-url=https://web.archive.org/web/20190412100403/https://www.flychicago.com/SiteCollectionDocuments/Business/FactAndFigures/AirTraffic/1218%20ORD%20SUMMARY.pdf |archive-date=April 12, 2019 |url-status=live }}</ref> || {{increase}}{{0}}4.40% || 903,747 || 1,868,880
|-
!2019
|'''84,649,115''' || {{increase}}{{0}}1.69% || 919,704 || 1,788,001
|-
!2020
|30,860,251 || {{decrease}}{{0}}63.54% || 538,211 || 2,052,025
|-
!2021
|54,020,399 || {{increase}}{{0}}75.06% || 684,201 || '''2,536,576'''
|-
!2022
|68,340,619 || {{increase}}{{0}}26.50% || 711,561 || 2,235,709
|-
!2023
|73,894,226|| {{increase}}{{0}}8.13% || 720,582 ||1,906,463
|-
!2024
|80,043,050|| {{increase}}{{0}}8.56% || 776,036 ||2,074,006
|}

=== On-time performance (domestic major U.S. carriers only) ===
{| class="wikitable sortable"
|+On-time performance by calendar year<ref name="Chicago_BTS" />
!rowspan=2|Year
!colspan=2|Percent of on-time flights
!colspan=2|Average delay (min)
!rowspan=2|Percent of<br>cancelled flights
|-
!Departures
!Arrivals
!Departures
!Arrivals
|-
!2017
|79%
|81%
|69.43
|77.38
|1.40%
|-
!2018
|77%
|77%
|69.15
|77.91
|2.14%
|-
!2019
|75%
|75%
|73.69
|86.01
|3.11%
|-
!2020
|84%
|85%
|65.36
|78.36
|6.18%
|-
!2021
|81%
|82%
|70.40
|82.42
|1.93%
|-
!2022
|78%
|79%
|70.26
|80.29
|2.75%
|-
!2023
|79%
|79%
|71.35
|78.22
|1.22%
|-
!2024
|77%
|78%
|76.43
|80.54
|1.35%
|}

==Major accidents and incidents==

The following is a list of major crashes or incidents that occurred to planes at O'Hare, on approach, or just after takeoff from the airport:<ref>{{cite web |title=Chicago–O'Hare International Airport, IL profile |website=Aviation Safety Network |url=http://aviation-safety.net/database/airport/airport.php?id=ORD |date=July 13, 2008 |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20101007233524/http://aviation-safety.net/database/airport/airport.php?id=ORD |archive-date=October 7, 2010 |url-status=live }}</ref>
* On September 17, 1961, [[Northwest Orient Airlines Flight 706]], a [[Lockheed L-188 Electra]], crashed upon takeoff, killing all 37 on board.<ref>{{cite web|title=ASN Aircraft accident Lockheed L-188C Electra N137US Chicago–O'Hare International Airport, IL (ORD)|work=Aviation Safety Network|url=http://aviation-safety.net/database/record.php?id=19610917-3|access-date=July 15, 2012|archive-url=https://web.archive.org/web/20121023113918/http://aviation-safety.net/database/record.php?id=19610917-3|archive-date=October 23, 2012|url-status=live}}</ref>
* On August 16, 1965, [[United Airlines Flight 389]], a [[Boeing 727]], crashed into [[Lake Michigan]], {{convert|30|mi|km}} east of O'Hare while on approach, killing all 30 on board.<ref>{{cite web |title=ASN Aircraft accident Boeing 727-22 N7036U Lake Michigan, MI |website=Aviation Safety Network |url=http://aviation-safety.net/database/record.php?id=19650816-0 |access-date=July 15, 2012 |archive-url=https://web.archive.org/web/20120425023708/http://aviation-safety.net/database/record.php?id=19650816-0 |archive-date=April 25, 2012 |url-status=live }}</ref>
* On December 27, 1968, [[North Central Airlines Flight 458]], a [[Convair CV-580]], crashed into a hangar at O'Hare, killing 27 on board and one on the ground.<ref>{{cite web |title=ASN Aircraft accident Convair CV-580 N2045 Chicago–O'Hare International Airport, IL (ORD) |website=Aviation Safety Network |url=http://aviation-safety.net/database/record.php?id=19681227-0 |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20130801071758/http://aviation-safety.net/database/record.php?id=19681227-0 |archive-date=August 1, 2013 |url-status=live }}</ref>
* On December 20, 1972, [[North Central Airlines Flight 575]], a [[Douglas DC-9]], crashed upon takeoff after colliding with [[Delta Air Lines Flight 954]], a [[Convair CV-880]] which was taxiing across the active runway; 10 passengers on the DC-9 were killed.<ref>{{cite web |title=ASN Aircraft accident McDonnell Douglas DC-9-31 N954N Chicago–O'Hare International Airport, IL (ORD) |work=Aviation Safety Network |url=http://aviation-safety.net/database/record.php?id=19721220-1 |date=December 20, 1972 |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20130801070925/http://aviation-safety.net/database/record.php?id=19721220-1 |archive-date=August 1, 2013 |url-status=live }}</ref>
* On May 25, 1979, [[American Airlines Flight 191]], a [[McDonnell Douglas DC-10]] on a Memorial Day weekend flight to [[Los Angeles International Airport]], had its left engine detach while taking off from runway 32R, then stalled and crashed into a field some {{convert|4600|ft|}} away. 273 died, including two on the ground, in the deadliest single-aircraft crash in United States history, and the worst aviation disaster in U.S. history prior to the [[September 11, 2001 attacks]].<ref>{{cite web |title=ASN Aircraft accident McDonnell Douglas DC-10-10 N110AA Chicago – O'Hare International Airport, IL (ORD) |url=http://aviation-safety.net/database/record.php?id=19790525-2 |website=Aviation Safety Network |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20110110032908/http://aviation-safety.net/database/record.php?id=19790525-2 |archive-date=January 10, 2011 |url-status=live }}</ref><ref>{{cite news |first=Cory |last=Franklin |title=Commentary: American Airlines Flight 191 still haunts |work=Chicago Tribune |url=http://www.chicagotribune.com/news/opinion/commentary/ct-american-airlines-ohare-crash-flight-191-hospital-perspec-0525-jm-20150522-story.html |date=May 24, 2015 |access-date=September 1, 2015 |archive-url=https://web.archive.org/web/20150909201404/http://www.chicagotribune.com/news/opinion/commentary/ct-american-airlines-ohare-crash-flight-191-hospital-perspec-0525-jm-20150522-story.html |archive-date=September 9, 2015 |url-status=live }}</ref>
* On March 19, 1982, a [[United States Air Force]] [[KC-135 Stratotanker]] crashed upon approach to O'Hare {{convert|40|mi|km}} northwest of the city (near [[Woodstock, Illinois|Woodstock]]), killing 27 people on board.<ref>{{cite web |title=ASN Aircraft accident Boeing KC-135A-BN Stratotanker 58-0031 Greenwood, IL |url=http://aviation-safety.net/database/record.php?id=19820319-0 |work=Aviation Safety Network |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20100531163517/http://aviation-safety.net/database/record.php?id=19820319-0 |archive-date=May 31, 2010 |url-status=live }}</ref>
* On February 9, 1998, [[American Airlines Flight 1340]], a [[Boeing 727]], crashed upon landing from Kansas City, injuring 22 passengers.<ref>{{cite web |title=ASN Aircraft accident Boeing 727 N845AA Chicago–O'Hare International Airport, IL (ORD) |url=http://aviation-safety.net/database/record.php?id=19980209-0 |website=Aviation Safety Network |access-date=November 3, 2010 |archive-url=https://web.archive.org/web/20130801082311/http://aviation-safety.net/database/record.php?id=19980209-0 |archive-date=August 1, 2013 |url-status=live }}</ref>
*On July 23, 2006, there was a near miss involving [[United Airlines]] Flight 1015, a [[Boeing 737 Classic|Boeing 737-322]], and [[Atlas Air]] Flight 6972, a [[Boeing 747-400|Boeing 747-47UF]]. All 131 occupants survive without injury.<ref>{{Cite web |title=Serious incident Boeing 737-322 N315UA, Sunday 23 July 2006 |url=https://asn.flightsafety.org/wikibase/370284 |access-date=2024-08-06 |website=asn.flightsafety.org}}</ref>
*On October 28, 2016, [[American Airlines Flight 383 (2016)|American Airlines Flight 383]] aborted takeoff on runway 28R after a fire broke out in the right engine of the [[Boeing 767-300ER]]; 20 passengers and one flight attendant were injured.<ref>{{cite web|title=Uncontained Engine Failure and Subsequent Fire American Airlines Flight 383 Boeing 767-323, N345AN|url=https://ntsb.gov/investigations/AccidentReports/Reports/AAR1801.pdf|website=ntsb.gov|publisher=National Transportation Safety Board|access-date=April 4, 2018|archive-url=https://web.archive.org/web/20180405024843/https://ntsb.gov/investigations/AccidentReports/Reports/AAR1801.pdf|archive-date=April 5, 2018|url-status=live}}</ref>
* On June 13, 2022, a [[June 2022 Chicago supercell|particularly intense supercell]] coincided with the landing of American Airlines Flight 151 from [[Charles de Gaulle Airport|Paris Charles de Gaulle]], which caused extreme turbulence where ground [[Automated airport weather station|ASOS]] reported a record-tying wind gust of {{cvt|84|mph|km/h}}. One passenger was physically removed from their seat as a result, suffering severe injuries. The passenger was not wearing a seatbelt at the time of the incident. A lawsuit against the airline was filed in 2024.<Ref>
{{cite web |url=https://cookcountyrecord.com/stories/660937914-airline-faces-lawsuit-over-severe-turbulence-injuries |title=Airline Faces Lawsuit Over Severe Turbulence Injuries |work=Cook County Record |date=22 June 2024 |access-date=11 April 2025 |location=[[Cook County, Illinois]] |archive-date=April 11, 2025 |archive-url=https://web.archive.org/web/20250411173230/https://cookcountyrecord.com/stories/660937914-airline-faces-lawsuit-over-severe-turbulence-injuries |url-status=dead }}
</ref>
* On May 18, 2025, a [[DoorDash]] driver attempting to make a delivery in a red [[Hyundai Elantra]] made it past a gated security checkpoint and onto the secure roadways at O’Hare, driving a significant distance until stopping on the ramp next to a United jet parked at the gate. Although approached by baggage handlers, security did not respond for another 10 minutes. No guard was present at the checkpoint, according to the driver, who was following the GPS coordinates to his destination, and the guard who was responsible did not immediately report the matter. However, the driver was not cited, and the Chicago Department of Aviation ended its relationship with the security contractor, which also no longer employs the guard.<ref>{{Cite web|url=https://wgntv.com/news/wgn-investigates/ohare-food-delivery-driver-tarmac-airport-security/|title=Door Dash delivery at O'Hare exposes hole in airport security|first=B.J.|last=Lutz|date=June 4, 2025|website=WGN-TV|access-date=June 7, 2025|archive-date=June 7, 2025|archive-url=https://web.archive.org/web/20250607015504/https://wgntv.com/news/wgn-investigates/ohare-food-delivery-driver-tarmac-airport-security/|url-status=dead}}</ref>

==See also==
* [[List of airports with triple takeoff/landing capability]]
* [[List of airports in Illinois]]
* [[List of busiest airports by passenger traffic|List of the world's busiest airports]], for a complete list of the busiest airports in the world
* [[Transportation in Chicago]]

==References==
{{reflist}}
* {{Air Force Historical Research Agency}}

== Further reading==

* Bednarek, Janet Rose Daly. ''America's airports: airfield development, 1918-1947'' (Texas A&M University Press, 2001).
* Branigan, Michael. ''A History of Chicago's O'Hare Airport'' (Arcadia Publishing, 2011) [https://books.google.com/books?hl=en&lr=&id=jHp2CQAAQBAJ&oi=fnd&pg=PT5&ots=w2IPlMJy7Z&sig=DFpHirlsN_iHs49olVg9Tw5JmeA online]
* Brodherson, David. "O'Hare Airport" ''Encyclopedia of Chicago''. (2004)  [http://www.encyclopedia.chicagohistory.org/pages/923.html  online]
* Brodherson, David. “All Airplanes Lead to Chicago: Airport Planning and Design in a Midwest Metropolis.” In ''Chicago Architecture and Design, 1923–1993: Reconfiguration of an American Metropolis,'' ed. John Zukowsky, (1993).
* Cannon, Charles B. ''The O'Hare Story'' (1980).
* Cidell, Julie. "When runways move but people don’t: The O’Hare Modernization Program and the relative immobilities of air travel." ''Mobilities'' 8.4 (2013): 528-541.
* Cidell, Julie. "O'Hare International Airport and land use incompatibility." ''Bulletin of the Illinois Geographical Society'' 48.1 (2006): 1-19.

* Doherty, Richard Paul. "The origin and development of Chicago-O'Hare International Airport" (PhD dissertation, Ball State University; ProQuest Dissertations & Theses,  1970. 7109048).
* Kent, David E. ''Midway Airport'' (Arcadia Publishing, 2013)  [https://books.google.com/books?hl=en&lr=&id=CN5B1HQrxDYC&oi=fnd&pg=PA6&dq=related:MBVR_rCxrg0J:scholar.google.com/&ots=U5LxJhgqzx&sig=0l-VxnmKVVFVvmfo4p45U3xz0ic online]
.

==External links==
{{Sister project links|O'Hare International Airport|voy=O'Hare International Airport}}
{{div col}}
* {{Official website|https://www.flychicago.com/ohare/}}
* [https://ord21.com/home/Pages/default.aspx O'Hare Modernization Program], City of Chicago
* [https://chicago.legistar.com/LegislationDetail.aspx?ID=3357763&GUID=936BA777-935A-43D1-BCD7-DE1164AF51AC&Options=&Search= Council Ordinance authorizing ORD21] (with TAP attached, O2018-1124 (V1).pdf), City of Chicago
* [https://web.archive.org/web/20110727133851/http://nwchicagohistory.org/nwch_ohare.html O'Hare History], Northwest Chicago Historical Society
* The Fascinating History of Chicago's O'Hare International Airport: [https://web.archive.org/web/20151017161106/http://airwaysnews.com/blog/2014/04/07/chicago-ohare-history/ 1920–1960], [https://web.archive.org/web/20151017161106/http://airwaysnews.com/blog/2014/04/14/the-fascinating-history-chicagos-ohare-international-airport-1960-2000/ 1960–2000], [https://web.archive.org/web/20151017161105/http://airwaysnews.com/blog/2014/04/21/the-fascinating-history-chicagos-ohare-international-airport-2000-to-present/ 2000 to Present]
* {{cite web|last=Olson|first=William|title=Sustainable Airport Design Takes Flight: The O'Hare Modernization Program|url=http://www.greenbeanchicago.com/index.php/sustainable-airport-design-takes-flight-ohare-modernization-program/|work=GreenBeanChicago.com|date=January 4, 2010|access-date=November 12, 2013|archive-date=November 12, 2013|archive-url=https://web.archive.org/web/20131112013549/http://www.greenbeanchicago.com/index.php/sustainable-airport-design-takes-flight-ohare-modernization-program/|url-status=dead}}
* {{FAA-diagram|00166}}
{{US-airport|ORD}}
* [https://radar.airport-frequencies.com/ Live KORD airplane map radar]
* {{cite report |url=https://www.justice.gov/sites/default/files/atr/legacy/2006/04/27/209455.pdf |title=Comments on Congestion And Delay Reduction at Chicago O'Hare International Airport |docket=FAA-2005-20704 |publisher=United States Department of Justice Antitrust Division |date=May 24, 2005 |last1=Pate |first1=R. Hewitt |last2=McDonald |first2=Bruce |last3=Gillespie |first3=William H. |access-date=September 2, 2011}}
* [https://www.bigorre.org/aero/meteo/KORD/en O'Hare International Airport aviation weather] {{in lang|es|en|fr|zh}}
* [http://libguides.northwestern.edu/transporationdigital Chicago O'Hare International Airport Digital Collection]
{{div col end}}
{{O&#39;Hare International Airport|state=expanded}}
{{Chicago}}
{{Major US Airports}}
{{Greater Chicago Airports}}
{{Aviation in Illinois}}
{{Authority control}}

{{DEFAULTSORT:O'hare International Airport}}
[[Category:O'Hare International Airport| ]]
[[Category:Airports established in 1944]]
[[Category:1944 establishments in Illinois]]
[[Category:Airports in Cook County, Illinois]]
[[Category:Airports in DuPage County, Illinois]]
[[Category:American Airlines]]
[[Category:Buildings and structures in Chicago]]
[[Category:United Airlines]]