Omega Airport Shuttle, Inc. - Shuttle service between Midway and O'Hare airports and south side locations. Includes fares, schedules and boarding locations. - http://www.omegashuttle.com/
Airport Express - Ground transportation services and shuttles to and from O'Hare and Midway Airports and offers services for individual travelers, group travelers, meeting and conventions. Coupons, reservation form and contacts provided. - http://www.airportexpress.com/