Airports / KPHN / St Clair County International AirportIATA PHNGood ground coverage
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📍 Port Huron⬆ 650 ft2 runways
KPHN · PHN

St Clair County International Airport

42.91100°N
-82.52890°W
ARR / DAY
5
▼ 33.9%
DEP / DAY
8
▼ 26.7%

St Clair County International Airport (KPHN/PHN) is a small general aviation airport located in Port Huron, MI, 34 mi north east of Sterling Heights. It features 2 runways with the longest being 5,103 feet. SkyMeter has observed roughly 5 arrivals and 8 departures per day on average over the last 7 days.

Safety incidents

Last 7 days · 0 total

NORMAL
↻
Go-arounds
0
✕
Rejected takeoffs
0
△
Unstable approaches
0
↺
Return to field
0

Current weather

From KDET, 42 mi away (KPHN does not publish METAR)

21m ago
Temp
70°F
Wind
4 kts
280°
Visib
10+ km
Ceil
—
KDET 192053Z 28004KT 10SM CLR 21/02 A3037 RMK AO2 SLP282 T02110022 56012

Runways

2 installed

5,103 FT MAX
04/22
5,103 ft × 100
ASP● LITHIGH
10/28
4,001 ft × 75
ASP● LITMED

Runway intelligence

Which runway carries the operations, observed over the last 30 days

04
44% of ops
143 land · 82 TO
22
22% of ops
70 land · 130 TO
10
19% of ops
61 land · 22 TO
28
15% of ops
49 land · 43 TO
Runway 04 carries 44% of operations (143 landings, 82 takeoffs) over the last 30 days. The next most-used is 22 at 22%.

Approach quality

Per-runway unstable-approach, go-around, and long-rollout rates

04 143 landings
UA 7%
22 70 landings
UA 4%
10 61 landings
UA 13%
28 49 landings
UA 16%
Approaches to 04 show a 7% unstable-approach rate (10 UA events from 143 landings).Phase B will add wind-correlation: which crosswind band produces most UA events.

Traffic behavior

When the field is busy: hourly + weekday vs weekend

Daily avg
17.9
flights/day · 538 total
Busy hour (local)
3pm
also 5pm · 6pm
Day vs night
70%
06:00–20:00 local
Traffic concentrates around 3pm–6pm local, averaging 17.9 flights/day. Weekend volume runs 1.0× weekday (18.6 vs 18.5 daily).

Aircraft character

What's actually flying here: top types over the last 30 days

161 · 43%
39 · 10%
34 · 9%
19 · 5%
16 · 4%
14 · 4%
Activity is led by (43% of 378 flights). Top three types: , , .

Communications Frequencies

2026-06-11
Type Freq (MHz) Hours
CTAF 123.050 —
APCH 119.600 —
APCH 391.900 —
UNICOM 123.050 —
AWOS 118.375 —
OTHER 126.525 —
ALGONAC 126.525 —
OTHER 285.525 —
ALGONAC 285.525 —
Airport operations
ARTCC:
ZOB
Mag var:
7° W
Fuel:
100LL, A+

Hourly traffic

Avg movements per hour · local time · last 30 days

12a 1a 2a 3a 4a 5a 6a 7a 8a 9a 10a 11a 12p 1p 2p 3p 4p 5p 6p 7p 8p 9p 10p 11p

Pilot & community notes

1 comment from OurAirports (click to expand)

1
Tony
7/22/2007
Clear US Customs here going to the USA
A nice convenient little airport to clear US Customs if you are heading West from Southern Ontario.
© SkyMeter · All flight data subject to ODbL attribution · Updated 21:14 UTC