Port Huron, Michigan
KPHN St Clair County Intl
St Clair County Intl (KPHN) is a non-towered, public-use airport in Port Huron, Michigan, at 650.1 ft MSL. It has 2 runways: 04/22 (5,104 by 100 ft, asphalt), 10/28 (4,000 by 75 ft, asphalt). CTAF 123.05.
FAA NASR data effective Oct 29, 2026. Not for navigation; verify with current FAA charts and the Chart Supplement.
Airport
At a glance
- Identifiers
- ICAO KPHN, FAA PHN
- Location
- Port Huron, Michigan (St Clair County). 5 NM SW of the city center
- Elevation
- 650.1 ft MSL
- Position
- 42.9110° N, 82.5288° W
- Control tower
- No, non-towered
- Sectional chart
- Detroit
- Magnetic variation
- 7° W (1985)
- Fuel
- 100LL, Jet A+
- Ownership
- Publicly owned, open to the public
- Attendance
- Daily 0800-1700
2 runways
Runways
| Runway | Length × width | Surface | Edge lights |
|---|---|---|---|
| 04/22 | 5,104 × 100 ft | Asphalt, good condition | High intensity |
| 10/28 | 4,000 × 75 ft | Asphalt, good condition | Medium intensity |
Runway ends and traffic pattern
| End | Pattern | Glide slope lights | Instrument | Displaced threshold | Landing distance |
|---|---|---|---|---|---|
| 04 | Left traffic | 4-light PAPI, left | ILS | None listed | Not listed |
| 22 | Left traffic | 4-light PAPI, left | None listed | None listed | Not listed |
| 10 | Left traffic | 4-light PAPI, left | None listed | None listed | Not listed |
| 28 | Left traffic | 4-light PAPI, left | None listed | None listed | Not listed |
VHF
Frequencies
- CTAF
- 123.05
- UNICOM
- 123.05
- Approach / departure
- 119.6
- "Selfridge"
Weather station
- AWOS-3P PHN
- 118.375
Before you go
Brief KPHN in Ascent EFB.
Current weather, NOTAMs and the airport diagram for St Clair County Intl, in the app on iPhone and iPad.
Not for navigation. Verify with current FAA charts and the Chart Supplement before flight.
Source: FAA NASR 28-day subscription, cycle effective Oct 29, 2026. Airport data changes every 28 days and NOTAMs can override it at any time.