KALN is the ICAO code for St Louis Regional Airport (IATA ALN), located in Alton/St Louis, IL.
St Louis Regional Airport (KALN) is a medium airport in Alton/St Louis, IL. Pilots and dispatchers reference it by ICAO code KALN or IATA code ALN. It sits in North America.
St Louis Regional Airport is a regional airport primarily serving general aviation, charter, and corporate flight departments. The 8,099-foot runway means it is well-suited as a dedicated bizjet field, free from airline scheduling pressure.
The longest runway measures 8,099 ft (2,469 m), a heavy-class field. Representative aircraft that operate comfortably here include the Gulfstream G550, Falcon 7X, and Bombardier Global 5500. In practice this most heavy and super-midsize jets operate here without restriction.
St Louis Regional Airport sits near sea level at 544 ft.
Local operations run on America/Chicago. Without scheduled airline traffic, the field tends to be quieter and more flexible for charter and corporate operations — a useful characteristic for early morning, late night, or short-notice flights that would be impractical at a hub.
SkyAccess inventory for KALN updates continuously as operators publish new empty legs and one-way repositioning trips. Pricing on each leg is available with a free account, and an inventory alert will email you the moment a leg appears on the route you care about.
Regional fields like KALN are a meaningful share of US private aviation — closer to the trip's actual origin or destination than the nearest major hub, with shorter ramp-to-cabin times that are the main reason owners and brokers prefer them.
St. Louis Regional Airport is a public airport four miles (6 km) east of Alton, in Madison County, Illinois, United States. It is in the village of Bethalto but its mailing address is East Alton.
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