St Alphonsus frequencies
St Alphonsus (ID91) in Boise, ID has no control tower, so nobody is sequencing traffic here — you announce your own position on 123.075. Every frequency below is in the order you tune it. · Open on the map
All of St Alphonsus — runways, frequencies, charts and live weatherTaxi & takeoff
- UNICOM 123.075
- 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.
What to say on 123.075
Nobody is sequencing traffic at ID91, 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 — 123.075 is not unique to St Alphonsus.
- Inbound, 10 miles out
St Alphonsus traffic, Skyhawk one two three four five, one zero miles south, inbound landing, St Alphonsus.
- Entering the pattern
St Alphonsus traffic, Skyhawk one two three four five, entering left downwind , St Alphonsus.
- Before taking the runway
St Alphonsus traffic, Skyhawk one two three four five, departing , St Alphonsus.
Pattern direction is not always left here — check the ID91 traffic pattern before you announce a leg. The Chart Supplement is authoritative if ID91 publishes a call name that differs from the airport's. Full guidance →
Every ID91 frequency, as one table
| UNICOM | 123.075 |
|---|
Frequently asked
What is the CTAF at ID91?
St Alphonsus is non towered. The common traffic advisory frequency is 123.075 — announce your position and intentions on entry and on each leg of the pattern.
More about ID91
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Something here wrong or out of date?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.