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Regional gateway serving the greater St. Louis metropolitan area.
Opened
1940
Location
Alton, Illinois, United States
St. Louis Regional Airport, designated with IATA code ALN and ICAO code KALN, is a public airport located in Alton, Illinois, situated on the bluffs above the Mississippi River northeast of St. Louis, Missouri. It serves general aviation, charter, and limited commercial operations for the bi-state metro region.
The airport covers several hundred acres and features runways capable of accommodating a range of aircraft from small general aviation planes to regional jets. It has historically served as a reliever airport for Lambert-St. Louis International Airport, handling overflow general aviation traffic.
While commercial scheduled airline service at ALN has been limited over the years, the airport supports significant corporate aviation, flight training, and cargo operations. Its proximity to the St. Louis metro area makes it a convenient option for private and business travelers in the Illinois portion of the region.
Terminals
The airport has a modest general aviation terminal facility with limited passenger amenities suited to its regional and general aviation traffic volume.
Getting to & from
The airport is accessible by car via local highways, located approximately 20 miles northeast of downtown St. Louis, with no dedicated public transit service directly to the terminal.
Notable facts
- ›Located in Alton, Illinois, on bluffs overlooking the Mississippi River.
- ›Serves primarily as a general aviation and corporate aviation facility.
- ›Functions as a reliever airport for Lambert-St. Louis International Airport.
- ›Supports flight training operations and based aircraft.
- ›Elevation is approximately 544 feet above mean sea level.
This profile is provided for general information only. Details may be inaccurate or outdated — always verify with the airport's official website before acting on them.
