KGRE · Greenville Airport

GREENVILLE, ILLINOIS · SMALL AIRPORT

541

Elevation ft

Runways

4,002

Longest ft · 18/36

38.84N

89.38W

Greenville Airport serves Greenville, Illinois at 541 ft elevation with its longest runway, 18/36, at 4,002 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
18/36	4,002 × 75 ft	asphalt	lit
09/27	2,822 × 250 ft	turf	unlit

02Density altitude and turboprop runway margins

Standard temperature at 541 ft is about 14°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, 14°C)	541 ft	2,544 ft	2,167 ft	3,251 ft
Warm day (ISA +10)	1,741 ft	2,778 ft	2,294 ft	3,441 ft
Hot day (ISA +20)	2,941 ft	3,012 ft	2,420 ft	3,630 ft
35°C afternoon	3,071 ft	3,037 ft	2,434 ft	3,651 ft

Planning aid only. Even on a 35°C afternoon the longest runway (18/36, 4,002 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,651 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 KGRE is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KENL Centralia Municipal Airport	23 nm SE	5,001 ft
KALN St Louis Regional Airport	31 nm W	8,099 ft
KMVN Mount Vernon Outland Airport	39 nm SE	6,496 ft
KCPS St Louis Downtown Airport	40 nm SW	7,002 ft
K1H2 Effingham County Memorial Airport	42 nm E	5,103 ft

04Jet A prices and FBOs at KGRE

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

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