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O'Hare International Airport (ORD)

10000 West O'Hare
Chicago, Cook County, Illinois , 60666

OHare International Airport
Photo: Piotr Konieczny License: CC BY-SA 3.0
Chicago O'Hare International Airport provides 186 aircraft gates throughout four Terminals and nine concourses. It is the largest hub of United Airlines and the second-largest hub of American Airlines.
It is the largest hub of United Airlines (whose headquarters is in downtown Chicago) and the second-largest hub of American Airlines (after Dallas/Fort Worth).

Prior to 2005, O'Hare was the world's busiest airport in terms of takeoffs and landings. That year, mainly due to limits imposed by the federal government to reduce flight delays at O'Hare, Hartsfield-Jackson Atlanta International Airport became the busiest.

The airport was constructed in 1942-43 as a manufacturing plant for Douglas C-54s during World War II.

The airport was renamed in 1949 after Lt. Cmdr. Edward "Butch" O'Hare, a World War II flying ace who was awarded the Medal of Honor.

Its familiar three-letter IATA code ORD comes from the name the airport was given after WWII, Orchard Field Airport.

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