KGTF · Great Falls International Airport

GREAT FALLS, MONTANA · MEDIUM AIRPORT · SCHEDULED SERVICE

3,680

Elevation ft

Runways

10,502

Longest ft · 03/21

47.48N

111.37W

Great Falls International Airport serves Great Falls, Montana at 3,680 ft elevation with its longest runway, 03/21, at 10,502 by 150 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 KGTF in JetDesk: live METAR, TAF, winds and runway verdict →

01Runways

Runway	Length × width	Surface	Lighting
03/21	10,502 × 150 ft	asphalt	lit
17/35	6,030 × 150 ft	asphalt	lit
07/25	4,294 × 75 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 3,680 ft is about 8°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, 8°C)	3,680 ft	3,156 ft	2,498 ft	3,747 ft
Warm day (ISA +10)	4,880 ft	3,390 ft	2,625 ft	3,937 ft
Hot day (ISA +20)	6,080 ft	3,624 ft	2,751 ft	4,127 ft
35°C afternoon	6,963 ft	3,796 ft	2,845 ft	4,267 ft

Planning aid only. Even on a 35°C afternoon the longest runway (03/21, 10,502 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (4,267 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 KGTF is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KCII Choteau Airport	38 nm NW	5,000 ft
KHLN Helena Regional Airport	58 nm SW	9,000 ft
K7S6 White Sulphur Springs Airport	62 nm S	6,100 ft
KSBX Shelby Airport	67 nm N	5,005 ft
KCTB Cut Bank International Airport	79 nm NW	5,300 ft

04Jet A prices and FBOs at KGTF

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

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