Chicago Midway International Airport
Chicago Midway International Airport is a major commercial airport on the southwest side of Chicago, Illinois, located eight miles (13 km) from the Loop. Established in 1927, Midway served as Chicago's primary airport until the opening of O'Hare International Airport in 1955. Today, Midway is the second-largest airport in Chicago metropolitan area and the state of Illinois, serving 22,221,499 passengers in 2015. Traffic is currently dominated by low-cost carrier Southwest Airlines; Chicago is Southwest's largest focus city.