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KPHN

St Clair County International Airport · Port Huron

Key Facts

Essential technical summary for MSFS 2020/2024 and X-Plane.

ILS Approach StatusILS FREQUENCIES VERIFIED ✅
Field Elevation
650 ft / 198 m
Transition Altitude
18,000 ft
Primary Channel
AWOS 118.38 MHz (AWOS 3)
Live Conversion
inHg
hPa
Flight Planning
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Welcome to the technical flight briefing for St Clair County International Airport (KPHN), located in Port Huron, United States. As a vital hub for Microsoft Flight Simulator 2024, MSFS 2020, and X-Plane pilots, this facility features 2 active runways with a maximum elevation of 650 ft. Instrument approaches (IFR) are supported with verified ILS frequencies and identifiers for precision landings.Reference the data below for primary communication channels and detailed runway characteristics. Pilots should observe a Transition Altitude of 18,000 ft verified for this field for altimeter reset procedures.

Airport Details

Full geographical and organizational metadata.

Full Name
St Clair County International Airport
ICAO / IATA
KPHN / PHN
Municipality
Port Huron
Country
Region
US-MI — Michigan
GPS Coordinates
Transition Altitude
18,000 ft
Elevation
650 ft
Wikipedia

Pilot Toolbox

External charts, live tracking and weather reports.

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Runways & ILS Approach Data

Detailed dimensions and instrument landing frequencies.

Runway 04 / 22
ILS EQUIPPEDLIGHTED
Runway Length: 5,103 ft / 1,555 m
Runway Width: 100 ft / 30 m
Surface Type: Asphalt
Heading: 36.1° / 216.1°
RWY 04 (36.1°)
110.90 MHz
IDENT: PHN | CRS: 43°
RWY 22 (216.1°)
No ILS / Visual Only
Runway 10 / 28
LIGHTED
Runway Length: 4,001 ft / 1,220 m
Runway Width: 75 ft / 23 m
Surface Type: Asphalt
Heading: 94.7° / 274.7°
RWY 10 (94.7°)
No ILS / Visual Only
RWY 28 (274.7°)
No ILS / Visual Only

Communication Frequencies

Air traffic control and advisory channels.

A/D SELFRIDGE APP/DEP
119.60 MHz
AWOS AWOS 3
118.38 MHz
UNIC CTAF/UNICOM
123.05 MHz

Nearby Airports

Alternative airports in the vicinity (km & nm).

CYZR
Chris Hadfield Airport
20 km / 11 nm
KMTCILS
Selfridge Air National Guard Base Airport
42 km / 22 nm
KDETILS
Coleman A. Young Municipal Airport
68 km / 37 nm
KPTKILS
Oakland County International Airport
78 km / 42 nm
CYQGILS
Windsor Airport
79 km / 43 nm

Base Airport Data: OurAirports (Public Domain)
Instrument Approach Data: FAA NASR · Cycle: Jan 2026