Chicago Midway International Airport (IATA: MDW, ICAO: KMDW), also known simply as Midway Airport is an airport in Chicago, Illinois, located on the city's southwest side, eight miles from Chicago's Loop. Midway is heavily used by low-cost carriers, and to a lesser extent by legacy carriers. It is Chicagoland's second busiest airport.

Southwest Airlines is currently the dominant carrier at Midway, controlling 29 of the airport's 43 gates. Currently, the airline offers 216 daily departures to 47 destinations. Midway is also the main operations base of ATA Airlines (ATA), which, in addition to its domestic network, flies internationally from Midway to cities in Mexico. Presently, AirTran Airways is the second largest carrier at Midway, offering about 30 daily non-stop flights to 8 destinations. AirTran is continuing its Chicago (Midway) expansion with the addition of nonstop service to Ft. Myers, Miami, and West Palm Beach. As of February 2007, the airline offers service to 11 non-stop destinations with 33 daily departures from Midway.