Columbia Airport frequencies
Columbia Airport (O22 · COA) in Columbia, CA has no control tower, so nobody is sequencing traffic here — you announce your own position on 122.975. Every frequency below is in the order you tune it. · Open on the map
All of Columbia Airport — runways, frequencies, charts and live weatherBefore taxi
- ASOS/AWOS 124.65
- 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.
Taxi & takeoff
- CTAF 122.975
- 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 122.975
- 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.
Departure & arrival Norcal
- App/Dep 125.1 (WEST-NORTH)
- 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
- Flight service 121.25 (LOW)
- Flight Service handles briefings, flight plans and en route advisories, reached here through a remote outlet. Open and close VFR flight plans, and get updated weather in the air. 1-800-WX-BRIEF reaches the same specialists from the ground.
What to say on 122.975
Nobody is sequencing traffic at O22, so every call is you telling other aircraft where you are. Open and close with the field name so a pilot tuned to a shared frequency knows which airport you mean — 122.975 is not unique to Columbia Airport.
- Inbound, 10 miles out
Columbia traffic, Skyhawk one two three four five, one zero miles south, inbound landing runway 11, Columbia.
- Entering the pattern
Columbia traffic, Skyhawk one two three four five, entering left downwind runway 11, Columbia.
- Before taking the runway
Columbia traffic, Skyhawk one two three four five, departing runway 11, Columbia.
Pattern direction is not always left here — check the O22 traffic pattern before you announce a leg. The Chart Supplement is authoritative if O22 publishes a call name that differs from the airport's. Full guidance →
By procedure & sector (3 more)
| 322.55 | ANGELS CAMP RCAG (LOW) |
|---|---|
| 327.0 | ANGELS CAMP RCAG (LOW) |
| 363.2 | APCH/P DEP/P (WEST-NORTH) |
Every O22 frequency, as one table
| ASOS/AWOS | 124.65 |
|---|---|
| CTAF | 122.975 |
| UNICOM | 122.975 |
| Flight service | 121.25 (LOW) |
| App/Dep | 125.1 · WEST-NORTH |
Frequently asked
What is the CTAF at O22?
Columbia Airport is non towered. The common traffic advisory frequency is 122.975 — announce your position and intentions on entry and on each leg of the pattern.
What is the ASOS/AWOS frequency at O22?
ASOS/AWOS at Columbia Airport is 124.65. It is an automated broadcast, so there is no letter to report — just take the altimeter setting and wind.
What is the approach frequency for O22?
App/Dep for Columbia Airport is 125.1, working as "Norcal" (WEST-NORTH). Call inbound for flight following or to begin an instrument approach.
More about O22
Frequencies from FAA NASR. For planning and education only; always verify against official sources.