KALN · St Louis Regional Airport

ALTON/ST LOUIS, ILLINOIS · MEDIUM AIRPORT

544

Elevation ft

Runways

8,099

Longest ft · 11/29

38.89N

90.05W

St Louis Regional Airport serves Alton/St Louis, Illinois at 544 ft elevation with its longest runway, 11/29, at 8,099 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.

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01Runways

Runway	Length × width	Surface	Lighting
11/29	8,099 × 150 ft	asphalt	lit
17/35	6,500 × 100 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 544 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)	544 ft	2,544 ft	2,167 ft	3,251 ft
Warm day (ISA +10)	1,744 ft	2,778 ft	2,294 ft	3,441 ft
Hot day (ISA +20)	2,944 ft	3,012 ft	2,421 ft	3,631 ft
35°C afternoon	3,075 ft	3,038 ft	2,434 ft	3,652 ft

Planning aid only. Even on a 35°C afternoon the longest runway (11/29, 8,099 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,652 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 KALN is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KSTL St. Louis Lambert International Airport	17 nm SW	11,020 ft
KCPS St Louis Downtown Airport	20 nm S	7,002 ft
KSUS Spirit of St Louis Airport	32 nm SW	7,486 ft
KFYG Washington Regional Airport	48 nm W	5,002 ft
KENL Centralia Municipal Airport	50 nm SE	5,001 ft

04Jet A prices and FBOs at KALN

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

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