KTHM · Thompson Falls Airport

THOMPSON FALLS, MONTANA · SMALL AIRPORT

2,467

Elevation ft

Runway

4,200

Longest ft · 08/26

47.57N

115.28W

Thompson Falls Airport serves Thompson Falls, Montana at 2,467 ft elevation with its longest runway, 08/26, at 4,200 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.

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01Runways

Runway	Length × width	Surface	Lighting
08/26	4,200 × 75 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 2,467 ft is about 10°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, 10°C)	2,467 ft	2,919 ft	2,370 ft	3,555 ft
Warm day (ISA +10)	3,667 ft	3,153 ft	2,497 ft	3,745 ft
Hot day (ISA +20)	4,867 ft	3,387 ft	2,623 ft	3,935 ft
35°C afternoon	5,459 ft	3,503 ft	2,686 ft	4,029 ft

Planning aid only. Even on a 35°C afternoon the longest runway (08/26, 4,200 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (4,029 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 KTHM is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KS83 Shoshone County Airport	37 nm W	5,316 ft
KS59 Libby Airport	43 nm N	5,003 ft
KGPI Glacier Park International Airport	60 nm NE	9,007 ft
KMSO Missoula Montana Airport	63 nm SE	9,501 ft
KCOE Coeur D'Alene Airport - Pappy Boyington Field	63 nm W	7,400 ft
KSZT Sandpoint Airport	67 nm NW	5,501 ft

04Jet A prices and FBOs at KTHM

No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at KTHM, 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 KTHM or read what a fuel stop actually saves.

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