Chicago O'Hare International Airport is a major international airport serving Chicago, Illinois, United States, located on the city's Northwest Side, approximately 17 miles northwest of the Loop business district. Operated by the Chicago Department of Aviation and covering 7,627 acres. O'Hare has non-stop flights to 249 destinations in North America, South Ame…Chicago O'Hare International Airport is a major international airport serving Chicago, Illinois, United States, located on the city's Northwest Side, approximately 17 miles northwest of the Loop business district. Operated by the Chicago Department of Aviation and covering 7,627 acres. 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. As of 2024, O'Hare is considered the most connected airport in the US, and 5th most connected airport in the world. It is also the United States' 4th busiest airport, and 7th biggest airport.