

It was renamed Orchard Field Airport in the mid-1940s and assigned the IATA code ORD. ĭesigned to be the successor to Chicago's Midway International Airport, itself nicknamed the "busiest square mile in the world," O'Hare began as an airfield serving a Douglas manufacturing plant for C-54 military transports during World War II. As of 2023, O'Hare is considered the world's most connected airport. Operated by the Chicago Department of Aviation and covering 7,627 acres (3,087 ha), O'Hare has non-stop flights to 214 destinations in North America, South America, the Caribbean, Europe, Africa, Asia, the Middle East, Oceania, and the North Atlantic region as of November 2022.

Chicago O'Hare International Airport ( IATA: ORD, ICAO: KORD, FAA LID: ORD), sometimes referred to as Chicago O'Hare, or simply O'Hare, is the main international airport serving Chicago, Illinois, located on the city's Northwest Side, approximately 17 miles (27 km) northwest of the Loop business district.
