St Louis Regional Airport
Daylight today(Jul 13, 2026, local time)
About 14h 40m of daylight. Civil twilight (dawn/dusk) approximates the FAA definition of night for logging and currency. Times are computed and approximate — verify with official sources.
About St Louis Regional Airport
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.
Summary from Wikipedia, photo via Wikimedia Commons, licensed under CC BY-SA.
Live weather
KALNLive departures & arrivals
Flight data by AeroDataBox. Times are estimates — not for navigation; confirm with the airline.
Where you can fly from here
Current scheduled routes & daily frequency by AeroDataBox. Approximate — confirm bookable schedules with the airline.
Map
Runway centrelines, navaids and overlapping airspace. Tiles © OpenStreetMap contributors. Reference only — not for navigation.
Runways (2)
| Runway | Length | Width | Surface | Lighting | Status |
|---|---|---|---|---|---|
| 11 / 29 | 8,099 ft / 2,469 m | 150 ft | Asp | Lighted | Open |
| 17 / 35 | 6,500 ft / 1,981 m | 100 ft | Asp | Lighted | Open |
Radio frequencies (9)
| Type | Description | Frequency |
|---|---|---|
| A/D | APP/DEP | 124.200 MHz |
| ATIS | ATIS | 128.000 MHz |
| AWOS | AWOS 3 | 128.000 MHz |
| CLD | CLNC DEL | 120.200 MHz |
| CTAF | CTAF | 126.000 MHz |
| GND | GND | 120.200 MHz |
| RDO | RDO | 122.050 MHz |
| TWR | REGIONAL TWR | 126.000 MHz |
| UNIC | UNICOM | 122.950 MHz |
Navaids(3)
Instrument procedures & charts
Airport diagram (1)
Instrument approaches (6)
Departure procedures (SIDs) (5)
Arrivals (STARs) (2)
Takeoff & alternate minimums (2)
Runway hot spots (1)
Charts published by the FAA (public domain) and updated each 28-day cycle. Always fly the current, official chart. Full charts page.
Airspace in this area(3)
| Name | Class | Type | Floor | Ceiling |
|---|---|---|---|---|
| ST LOUIS CLASS B AREA E EXCLUDES AREA A,B,C AND D | Class B | Controlled | 3000 ft MSL | 8000 ft MSL |
| ST LOUIS CLASS B AREA K | Class B | Controlled | 5000 ft MSL | 8000 ft MSL |
| ALTON/ST LOUIS CLASS D | Class D | Controlled | GND | 3000 ft MSL |
Approximate bounding-box match from OpenAIP · all United States airspace. Reference only — consult official charts for exact boundaries and status.
Nearby airports
Great-circle distance and true bearing from St Louis Regional Airport.
Frequently asked questions
What is the ICAO code for St Louis Regional Airport?
The ICAO code for St Louis Regional Airport is KALN, and its IATA code is ALN.
Where is St Louis Regional Airport located?
St Louis Regional Airport is medium airport located in Alton/St Louis, United States, at an elevation of 544 ft (166 m).
How many runways does St Louis Regional Airport have?
St Louis Regional Airport has 2 runways, the longest being 8,099 ft / 2,469 m.
What time zone is St Louis Regional Airport in?
St Louis Regional Airport is in the America/Chicago time zone (UTC-05:00).
What is the magnetic variation at St Louis Regional Airport?
The magnetic variation (declination) at St Louis Regional Airport is approximately 2.1° W, per the World Magnetic Model. Variation changes slowly over time — always use the current value charted for navigation.
What airports are near St Louis Regional Airport?
The nearest airport to St Louis Regional Airport is Weidner Airport (4IS9), about 12.4 nm to the nne, followed by Willhoit Airport and St Louis Metro-East Airport/Shafer Field.
Is the information on this page suitable for flight planning?
No. St Louis Regional Airport data here is for reference and training only — not for navigation. Always consult official sources and current charts before any flight.