MDW is the International Air Transport Associations (IATA) code for Chicago Midway International Airport. It is a major commercial airport located on the Southwest side of Chicago, Illinois, approximately 12 miles (19 km) from the citys Loop business district. It served as Chicagos primary airport until the opening of OHare International Airport in 1944. There are hundreds of non-stop flights daily from Midway International Airport to many destinations around the world. Passengers can get to and from Midway International Airport by public transportation, taxi, shuttle, bus, and more.