KJVL · Southern Wisconsin Regional Airport

JANESVILLE, WISCONSIN · SMALL AIRPORT

808

Elevation ft

Runways

7,302

Longest ft · 14/32

42.62N

89.04W

Southern Wisconsin Regional Airport serves Janesville, Wisconsin at 808 ft elevation with its longest runway, 14/32, at 7,302 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 KJVL in JetDesk: live METAR, TAF, winds and runway verdict →

01Runways

Runway	Length × width	Surface	Lighting
14/32	7,302 × 150 ft	concrete	lit
04/22	6,701 × 150 ft	asphalt	lit
18/36	5,004 × 75 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 808 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)	808 ft	2,596 ft	2,195 ft	3,293 ft
Warm day (ISA +10)	2,008 ft	2,830 ft	2,322 ft	3,483 ft
Hot day (ISA +20)	3,208 ft	3,064 ft	2,448 ft	3,673 ft
35°C afternoon	3,402 ft	3,102 ft	2,469 ft	3,703 ft

Planning aid only. Even on a 35°C afternoon the longest runway (14/32, 7,302 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,703 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 KJVL is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KEFT Monroe Municipal Airport	24 nm W	5,000 ft
KRFD Chicago Rockford International Airport	26 nm S	10,002 ft
KFEP Albertus Airport	33 nm SW	5,504 ft
KMSN Dane County Regional Truax Field	34 nm NW	9,006 ft
KUES Waukesha County Airport	44 nm NE	5,849 ft
KRPJ Rochelle Municipal Airport - Koritz Field	44 nm S	5,001 ft

04Jet A prices and FBOs at KJVL

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

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