St Louis Regional Airport frequencies
St Louis Regional Airport (ALN · KALN) in Alton/St Louis, IL is a towered field, staffed 0700-2200. Every frequency below is in the order you tune it, from the first call to the handoff on climb out. · Open on the map
All of St Louis Regional Airport — runways, frequencies, charts and live weatherWhen the KALN tower is closed
The tower is staffed 0700-2200. Outside those hours St Louis Regional Airport has no operating control tower: it becomes a self announce field on 126.0, and separation from other traffic is yours, not a controller's. Report your position and intentions on entry and on each leg of the pattern.
Runway lighting is often pilot controlled once the tower closes — check the KALN airport page for the click sequence, and what to say on the radio.
Before taxi Regional
- ATIS 128.0
- A recorded loop of the field's weather, active runway and any notices, updated hourly or whenever conditions change. Listen before your first call, and tell the controller which letter you have so they do not read it to you again.
- ASOS/AWOS 128.0
- An automated weather station reading the field conditions aloud — wind, visibility, ceiling, temperature and altimeter. It replaces ATIS at a field with no controller to record one. Get the altimeter setting before you descend below the transition altitude.
- Clearance 120.2 (WHEN TWR CLSD)
- Clearance delivery issues your IFR clearance, and at busier fields your VFR departure instructions and squawk code. Call before you request taxi, with the ATIS letter and your intended direction of flight.
Taxi & takeoff Regional
- Ground 120.2
- Ground control owns every taxiway and inactive runway on the field. Call for taxi with your position and destination on the field. You need an explicit clearance to cross any runway, including one that is not in use.
- Tower 126.0
- Tower owns the active runways and the surrounding surface area. Call before entering the surface area inbound, and hold short until you are cleared to take off or to cross.
Departure & arrival Saint Louis
- App/Dep 124.2
- One radar controller working both arrivals and departures — normal at a smaller TRACON. The same frequency takes your climb out and your inbound call.
Also
- CTAF 126.0
- The common frequency pilots use to announce themselves to each other at a field with no operating control tower. Nobody is controlling traffic — you are self announcing. Report your position and intentions on entry and on each leg of the pattern, and listen well before you transmit.
- UNICOM 122.95
- A ground station run by the FBO rather than the FAA, for fuel, parking and airport services. Use it for services. Where the field has no separate CTAF, the same frequency doubles as the advisory frequency.
By procedure & sector (6 more)
| 119.15 | FARMR STAR |
|---|---|
| 128.1 | DELMA STAR |
| 239.0 | LCL/P |
| 307.05 | DELMA STAR |
| 335.5 | FARMR STAR |
| 353.9 | APCH/P DEP/P |
Every KALN frequency, as one table
| ATIS | 128.0 |
|---|---|
| ASOS/AWOS | 128.0 |
| Clearance | 120.2 (WHEN TWR CLSD) |
| Ground | 120.2 |
| Tower | 126.0 |
| CTAF | 126.0 |
| UNICOM | 122.95 |
| App/Dep | 124.2 |
Frequently asked
What is the tower frequency at KALN?
St Louis Regional Airport tower is 126.0, calling "Regional Tower". The tower is staffed 0700-2200.
What frequency do I use at KALN when the tower is closed?
Outside 0700-2200, St Louis Regional Airport has no operating control tower and becomes a self announce field. Use 126.0 as the CTAF and report your position and intentions — there is nobody to clear you, so separation is yours.
What is the ground frequency at KALN?
Ground control at St Louis Regional Airport is 120.2. You need an explicit clearance from ground to cross any runway while taxiing, including one that is not in use.
What is the ATIS frequency at KALN?
ATIS at St Louis Regional Airport is 128.0. Listen before your first call and report the letter you have.
What is the approach frequency for KALN?
App/Dep for St Louis Regional Airport is 124.2, working as "Saint Louis". Call inbound for flight following or to begin an instrument approach.
Where do I get my clearance at KALN?
Clearance delivery at St Louis Regional Airport is 120.2 (WHEN TWR CLSD). Call before requesting taxi, with the current ATIS letter and your direction of flight.
More about KALN
Frequencies from FAA NASR. For planning and education only; always verify against official sources.
Something here wrong or out of date? Report a data problem.