K4A9 · Isbell Field

FORT PAYNE, ALABAMA · SMALL AIRPORT

877

Elevation ft

Runway

5,001

Longest ft · 04/22

34.47N

85.72W

Isbell Field serves Fort Payne, Alabama at 877 ft elevation with its longest runway, 04/22, at 5,001 by 100 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
04/22	5,001 × 100 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 877 ft is about 13°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, 13°C)	877 ft	2,609 ft	2,203 ft	3,304 ft
Warm day (ISA +10)	2,077 ft	2,843 ft	2,329 ft	3,494 ft
Hot day (ISA +20)	3,277 ft	3,077 ft	2,456 ft	3,684 ft
35°C afternoon	3,487 ft	3,118 ft	2,478 ft	3,717 ft

Planning aid only. Even on a 35°C afternoon the longest runway (04/22, 5,001 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,717 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 K4A9 is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
K4A6 Scottsboro Municipal Word Field	19 nm NW	5,240 ft
KRMG Richard B Russell Airport	29 nm E	7,010 ft
KBFZ Albertville Regional Airport/Thomas J Brumlik Field	30 nm SW	6,114 ft
KGAD Northeast Alabama Regional Airport	35 nm SW	6,802 ft

04Jet A prices and FBOs at K4A9

No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at K4A9, 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 K4A9 or read what a fuel stop actually saves.

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