KFEP · Albertus Airport

FREEPORT, ILLINOIS · SMALL AIRPORT

859

Elevation ft

Runways

5,504

Longest ft · 06/24

42.25N

89.58W

Albertus Airport serves Freeport, Illinois at 859 ft elevation with its longest runway, 06/24, at 5,504 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.

Open KFEP in JetDesk: live METAR, TAF, winds and runway verdict →

01Runways

Runway	Length × width	Surface	Lighting
06/24	5,504 × 100 ft	asphalt	lit
18/36	2,404 × 150 ft	turf	unlit
13/31	2,285 × 150 ft	turf	unlit

02Density altitude and turboprop runway margins

Standard temperature at 859 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)	859 ft	2,606 ft	2,201 ft	3,301 ft
Warm day (ISA +10)	2,059 ft	2,840 ft	2,327 ft	3,491 ft
Hot day (ISA +20)	3,259 ft	3,074 ft	2,454 ft	3,681 ft
35°C afternoon	3,465 ft	3,114 ft	2,476 ft	3,713 ft

Planning aid only. Even on a 35°C afternoon the longest runway (06/24, 5,504 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,713 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 KFEP is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KRFD Chicago Rockford International Airport	22 nm E	10,002 ft
KEFT Monroe Municipal Airport	22 nm N	5,000 ft
KSQI Whiteside County Airport - Joseph H Bittorf Field	31 nm S	6,499 ft
KRPJ Rochelle Municipal Airport - Koritz Field	31 nm SE	5,001 ft
KJVL Southern Wisconsin Regional Airport	33 nm NE	7,302 ft
KCWI Clinton Municipal Airport	42 nm SW	5,204 ft

04Jet A prices and FBOs at KFEP

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

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