The Main Terminal has four concourses (A, B, C and D). The main terminal facility has two levels: the upper level, is tickets, check-in, and ground transportation drop-off; the lower level, has baggage claim, security scanning stations to connect to each concourse, and ground transportation for leaving the airport after your flight arrives. The lower level also provides the most convenient connection to the airport parking garage and the Bus Port, which is served by MetroBus and Greyhound.

American Airlines is the largest airline operating at Lambert, but you can also fly to/from Lambert via Continental, America West, Delta, United, US Air, and others.

East Terminal is primarily used by Southwest Airlines and charter flights.

Contact the U.S. Transportation Security Administration and/or your airline for details on what you may bring aboard the flight and other security concerns.

Contact your airline directly for information on flight arrivals/departures and reservations.