The list of largest airports in Illinois with scheduled flights. The 6th busiest airport in the world is Chicago O'Hare International Airport. It is the major airport in the state.
|ORD||Chicago O'Hare International Airport||Chicago|
|MDW||Chicago Midway International Airport||Chicago|
|PIA||General Wayne A. Downing Peoria International Airport||Peoria|
|MLI||Quad City International Airport||Moline|
|BMI||Central Illinois Regional Airport at Bloomington-Normal||Bloomington|