Chicago ORD
When measured by landings and takeoffs, Chicago O’Hare International Airport is the world’s busiest airport. It serves communities in Indiana and Wisconsin as well as those in northeastern Illinois. United Airlines and American Airlines use the airport as a hub, with Spirit Airlines and Frontier using it as a focus city.
The airport comprises of four terminals and nine concourses, as well as eight runways. There are over 180 gates, nine concourses, and eight runways. Non-stop flights are available to roughly 210 destinations worldwide, including more than 150 in the United States.