KOYM · St Marys Municipal Airport

ST MARYS, PENNSYLVANIA · SMALL AIRPORT

1,934

Elevation ft

Runway

4,300

Longest ft · 10/28

41.41N

78.50W

St Marys Municipal Airport serves St Marys, Pennsylvania at 1,934 ft elevation with its longest runway, 10/28, at 4,300 by 75 ft. The figures below are computed from FAA NASR runway data (via OurAirports) and the same rules of thumb JetDesk uses on the airport page in the app; the POH and current NOTAMs are the authority.

Open KOYM in JetDesk: live METAR, TAF, winds and runway verdict →

01Runways

Runway	Length × width	Surface	Lighting
10/28	4,300 × 75 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 1,934 ft is about 11°C. Every 1,000 ft of density altitude adds roughly 8 percent to a turboprop's takeoff distance and 5 percent to its landing distance. The table uses Piper Meridian book numbers (2,438 ft takeoff and 2,110 ft landing over a 50 ft obstacle at sea level, ISA, max weight) as a reference airplane; heavier turboprops and light jets scale the same way from their own POH figures.

Conditions	Density altitude	Takeoff est.	Landing est.	Landing × 1.5
Standard day (ISA, 11°C)	1,934 ft	2,815 ft	2,314 ft	3,471 ft
Warm day (ISA +10)	3,134 ft	3,049 ft	2,441 ft	3,661 ft
Hot day (ISA +20)	4,334 ft	3,283 ft	2,567 ft	3,851 ft
35°C afternoon	4,798 ft	3,374 ft	2,616 ft	3,924 ft

Planning aid only. Even on a 35°C afternoon the longest runway (10/28, 4,300 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,924 ft needed). The percentages are a generic rule of thumb applied to one reference airplane, not certified performance data for any specific aircraft, and the runway size categories describe the runway, not your airplane's suitability. Verify with the approved flight manual before every flight.

03Nearby fields with 5,000 ft or more

Useful as alternates, as fuel stops when the price at KOYM is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KDUJ DuBois Regional Airport	23 nm SW	5,503 ft
KBFD Bradford Regional Airport	24 nm N	6,307 ft
KPSB Mid-State Regional Airport	37 nm SE	5,711 ft
KAXQ Clarion County Airport	44 nm W	5,003 ft
KUNV State College Regional Airport	45 nm SE	6,701 ft
KELZ Wellsville Municipal Airport - Tarantine Field	48 nm NE	5,300 ft

04Jet A prices and FBOs at KOYM

No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at KOYM, the app flags a price stale after two weeks, and the route finder ranks every field within a corridor of your route by net savings after the cost of the extra cycle. Log a price at KOYM or read what a fuel stop actually saves.

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