St Louis Regional Airport

St Louis Regional Airport is an airport located in Alton/St Louis Illinois, US. The airport's IATA code is ALN, which is the three-letter code used on boarding passes and flight bookings. The ICAO code is KALN, used by air traffic control and pilots for flight planning.

The airport operates in the America/Chicago timezone. When planning flights to or from ALN, use our flight duration calculator to account for timezone differences, especially for international travel.

St Louis Regional Airport sits at an elevation of 544 feet (166 meters) above sea level.

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