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O’Hare International Airport
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Locator map for O'Hare International Airport in Chicago, Illinois, showing an aerial view of the airport's runways and terminals. Insets highlight the airport's location within the city of Chicago and its position in northeastern Illinois near Lake Michigan. Cathay Pacific Boeing 777-300 passenger jet taking off from Chicago O'Hare Airport, with terminal and control tower visible in the background. Aerial view of Chicago O'Hare International Airport showing terminals, parked airplanes, runways, taxiways, and surrounding airport grounds. Passengers walk through a busy concourse at Chicago O'Hare International Airport, with overhead signs for gates and services visible above. Aerial view of O'Hare International Airport in Chicago, Illinois, with runways and terminals visible and snow covering much of the ground. Terminal 1 at O'Hare International Airport
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Locator map for O'Hare International Airport in Chicago, Illinois, showing an aerial view of the airport's runways and terminals. Insets highlight the airport's location within the city of Chicago and its position in northeastern Illinois near Lake Michigan.
O'Hare International Airport Map of O'Hare International Airport, Chicago, Illinois, showing the airport's layout and its location within the city of Chicago and the state of Illinois.

O’Hare International Airport

airport, Chicago, Illinois, United States
Also known as: Chicago O’Hare, Douglas Airport, ORD, Orchard Field Airport(Show More)
Written by
Michele Metych
Michele Metych is the lead editor for Today in History at Encyclopædia Britannica.
Michele Metych
Fact-checked by
Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
Britannica Editors
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•History

O’Hare International Airport, one of the busiest and most connected airports in the world and the busiest in the Chicago area. Located 17 miles (27 km) northwest of downtown Chicago, O’Hare is a gateway for both domestic and international travel. Serving more than 260 destinations on more than 40 airlines, O’Hare handled 80 million passengers in 2025 and ranked as the world’s busiest airfield that year. Initially known as Douglas Airport, the site was developed...

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