KPHN · PHN
St Clair County International Airport
St Clair County International Airport (KPHN / PHN) is a general-aviation airfield serving Port Huron, Michigan. The field lies at 650 ft (198 m) above sea level and has two crossing runways, the longest 5,104 ft (1,556 m), asphalt and lit. Its nearest neighbour is Crystal Airport (MI41), 5 nm S.
St Clair County International Airport is a smaller field, so Alārium does not attribute movements to it directly — but aircraft flying near it appear on the live map like any other, at their real altitude and on their real track.
Location
- Elevation
- 650 ft (198 m)
- Coordinates
- 42.9110, -82.5289
- Serving
- Port Huron
- Region
- Michigan
- Time zone
- America/Detroit
Runways2 · longest 5,104 ft
The diagram is drawn from published threshold coordinates, so each runway sits where it actually sits — true bearings, true separations, true lengths. Runway widths are exaggerated against length, which at true proportion would draw a hairline. It is a diagram, not a chart to navigate by.
| Runway | Length | Width | Surface | Lighting |
|---|---|---|---|---|
| 04/22 | 5,104 ft1,556 m | 100 ft | Asphalt | Lit |
| 10/28 | 4,000 ft1,219 m | 75 ft | Asphalt | Lit |
Nearby airfields
Runway and field data from the OurAirports public-domain dataset. Positions are ADS-B, which covers most but not all aircraft.