- Midway Airport, also known as Chicago Midway International Airport, is an international airport located on the southwest side of Chicago, Illinois. It is the second-largest airport in the city, after O'Hare International Airport. Midway Airport serves as a hub for Southwest Airlines and operates flights to various domestic and international destinations. It is a convenient option for travelers seeking alternative transportation options to and from the city of Chicago. The airport offers a range of amenities and services, including dining options, retail stores, and ground transportation options such as taxis, ride-sharing services, and public transportation.