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 (27 km) northwest of the Loop business district. Operated by the Chicago Department of Aviation and covering 7,627 acres (3,087 ha), O'Hare has non-stop flights to 249 destinations in North America, South America, the Caribbean, Europe, Africa, Asia, the Middle East, Oceania, and the North Atlantic region as of Summer 2024. As of 2023, O'Hare is considered the world's most connected airport. It is also the United States' 4th busiest airport, and 7th biggest airport.