According to our latest research there are 729 active airports in United States. The largest airport by number of direct routes (253) is Chicago O'Hare International.
Below you can see the 20 airports with the most direct flights. You can find all 729 airports on the map or in the drop-down list.
You can find more information about the country here: United States.
* Active airport means an airport serving scheduled or charter flights available in global distribution systems.