St Clair County International Airport

PHN · KPHN · Port Huron, MI · 650 ft elevation · var 7W · Non-towered

Overview Weather Runways Comms & NavAids Charts Services & info

Airport information

ICAO / IATA: KPHN / PHN
Coordinates: 42.9110, -82.5289
Elevation: 650 ft MSL
Magnetic variation: 7W
Sectional chart: DETROIT
Airport use: Public
Control tower: No
Weather station: AWOS-3P · 118.375 · ☎ 810-364-7787
ARTCC: CLEVELAND (ZOB)
Flight service (FSS): LANSING · 1-800-WX-BRIEF
NOTAM facility: PHN
Attendance: ALL 0800-1700
Beacon: white-green (SS-SR)
Segmented circle: Yes
Wind indicator: lighted
Customs / AOE: Yes
Landing fee: Yes
Activated: 1951/11
Distance from city: 5 SW

Weather

METAR observed

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TAF forecast

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Sun & FAA night 2026-06-22

Event	Local (EDT)	UTC
Morning civil twilight Loggable night ends	05:16 AM	09:16Z
Sunrise	05:51 AM	09:51Z
Sunset	09:13 PM	01:13Z
Evening civil twilight Loggable night begins	09:48 PM	01:48Z

Loggable night (§1.1)

09:48 PM → 05:16 AM

Night currency (§61.57)

10:13 PM → 04:51 AM

Plan a flight from KPHN

Destination (ICAO)

TAS (kt)Burn (gph)Reserve (hr)Wind from (°)Wind (kt)

Night operations

Airport lighting: SEE RMK
Rotating beacon: white-green · SS-SR
Pilot-controlled lighting: ACTVT MALSR RWY 04; REIL RWY 22, 10, & 28; PAPI RWY 10 & 28; HIRL RWY 04/22; MIRL RWY 10/28 - CTAF. PAPI RWY 04 & 22 OPR CONSLY. on 123.05 — Chart Supplement ↗

Runway lighting aids — 04: 4-light PAPI (left) + MALSR · 22: 4-light PAPI (left) · 10: 4-light PAPI (left) · 28: 4-light PAPI (left).

FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.

Traffic pattern

Landing runway

LEFT traffic

Landing: Rwy 04 · 043°
Pattern: left (turns left)
TPA: 1,700 ft MSL (≈1,000 AGL)
CTAF: 123.05

Enter the left downwind for Rwy 04 at 1,700 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).

Runway 04/22

5,104 ft × 100 ft · Asphalt (Good)

Edge lights: High. Surface: Grooved. Weight bearing: Single wheel 40k, Double wheel 55k, Dual tandem 90k.

Heading: 043° mag · 36° true
Threshold elev: 640 ft
Markings: precision
VGSI: 4-light PAPI (left) (3°)
Approach lights: MALSR
Instrument landing: ILS · CAT I · LOC 110.9 (PHN) · GS 3.00°
Traffic pattern: Left
Approach obstacle: Tree, 49 ft, 592 ft from threshold, 573 ft L of centerline — 8:1 slope to clear · penetrates the 20:1 visual approach surface
Threshold crossing height: 50 ft
TDZ elevation: 647 ft

Heading: 223° mag · 216° true
Threshold elev: 650 ft
Markings: precision
VGSI: 4-light PAPI (left) (3°)
Traffic pattern: Left
Approach obstacle: Tree, 76 ft, 1,870 ft from threshold, 78 ft R of centerline — 21:1 slope to clear
Threshold crossing height: 45 ft
TDZ elevation: 650 ft
End lights: REIL

Runway 10/28

4,000 ft × 75 ft · Asphalt (Good)

Edge lights: Med. Weight bearing: Single wheel 16k.

Heading: 102° mag · 95° true
Threshold elev: 643 ft
Markings: nonprecision
VGSI: 4-light PAPI (left) (3°)
Traffic pattern: Left
Approach obstacle: Tree, 71 ft, 1,386 ft from threshold, 250 ft L of centerline — 16:1 slope to clear · penetrates the 20:1 visual approach surface
Threshold crossing height: 26 ft
TDZ elevation: 647 ft
End lights: REIL

Heading: 282° mag · 275° true
Threshold elev: 650 ft
Markings: nonprecision
VGSI: 4-light PAPI (left) (3.5°)
Traffic pattern: Left
Approach obstacle: Tree, 57 ft, 1,173 ft from threshold, 35 ft R of centerline — 17:1 slope to clear · penetrates the 20:1 visual approach surface
Threshold crossing height: 33 ft
TDZ elevation: 650 ft
End lights: REIL

Will it fit? Your aircraft's required runway length (from the POH) — checked against every runway here

ft · ≥1.5× comfortable, under 1.25× tight · saved across airports

Runway	Length	Your margin
04/22	5,104 ft
10/28	4,000 ft

Communication frequencies

Tower & ground

ASOS/AWOS	118.375
CTAF	123.05
UNICOM	123.05
Flight service	126.525 (HIGH)

Approach & departure · “Selfridge”

App/Dep	119.6

ATC assigns the exact frequency (in your clearance or on handoff) — which one depends on your SID (departing) or STAR (arriving).

By procedure & sector (2 frequencies)

Frequency	Used by
285.525	ALGONAC RCAG (HIGH)
391.9	APCH/P DEP/P

Source: FAA NASR (current 28-day cycle).

Instrument landing systems

Runway	ILS
RWY 04	ILS · CAT I · LOC 110.9 (PHN) · GS 3.00°

Source: FAA NASR (current 28-day cycle).

Nearby navigation aids

NavAid	Type	Freq	Radial / Dist magnetic
ECK · Peck	VORTAC	114.00	r165° / 22.3 NM
MTC · Selfridge	TACAN	133.70	r043° / 22.3 NM

Procedures at a glance

Lowest mins: ILS · vertical guidance Takeoff mins / ODP ↗ Non-std alternate mins ↗

Approaches3

Minimums & Hot Spots

Chart Supplement FAA A/FD

Open PDF ↗

Preview Chart Supplement

VFR sectional

Open KPHN on the VFR sectional (SkyVector) ↗

Services

Fuel available: 100LL, Jet A (additive)
Bottled oxygen: NONE
Bulk oxygen: NONE
Airframe service: MAJOR
Powerplant service: MAJOR
Parking: tiedowns, hangars

Ownership & management

Owner

SAINT CLAIR COUNTY

201 MCMORRAN BLVD, PORT HURON, MI

810-364-6890

Manager

CATHERINE FIORE

177 ASH DR, KIMBALL, MI

810-364-6890

Remarks FAA

DEER & LRG BIRDS ON & INVOF ARPT.
TSATLC FLTS MUST NTFY US CUST AT 810-985-9541 ONE HR PRIOR TO ENTRY INTO THE US. NTFY US DEPT OF AGRICULTURE AT 810-985-6126 & AMGR 24 HRS PRIOR FOR DISPOSAL OF ACFT INTL TRASH.
FOR CD CTC SELFRIDGE APCH AT 586-239-5706, WHEN APCH CLSD CTC CLEVELAND ARTCC AT 440-774-0224/0490.
ACTVT MALSR RWY 04; REIL RWY 22, 10, & 28; PAPI RWY 10 & 28; HIRL RWY 04/22; MIRL RWY 10/28 - CTAF. PAPI RWY 04 & 22 OPR CONSLY.
COML & CORPORATE LDG FEE WAIVED WITH FUEL PURCHASE.
UNATNDD MAJOR HOLS.

Nearby airports

MI41 · Crystal AirportPrivate (5 NM)5Y5 · David's Landing Airport (7 NM)D99 · Robertson Field (9 NM)39G · Avoca Airport (9 NM)MI01 · Fasel Field (11 NM)2E2 · Sharpe's Strip (11 NM)

Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open KPHN in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.

About KPHN

St Clair County International Airport (PHN · KPHN) is an airport in Port Huron, MI, at 650 ft MSL. It has 2 runways, the longest 5,104 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for KPHN, refreshed from the Aviation Weather Center and FAA NASR.

Does KPHN have a control tower?

No. St Clair County International Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.

What is the longest runway at KPHN?

St Clair County International Airport has 2 runways; the longest is 5,104 ft. See the Runways tab for headings, surface, and lighting.

Where is KPHN?

St Clair County International Airport is in Port Huron, MI, at an elevation of 650 ft MSL. Coordinates: 42.9110, -82.5289.

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