K4I3 · Knox County Airport

MOUNT VERNON, OHIO · SMALL AIRPORT

1,191

Elevation ft

Runway

5,504

Longest ft · 10/28

40.33N

82.52W

Knox County Airport serves Mount Vernon, Ohio at 1,191 ft elevation with its longest runway, 10/28, 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.

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01Runways

Runway	Length × width	Surface	Lighting
10/28	5,504 × 100 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 1,191 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)	1,191 ft	2,670 ft	2,236 ft	3,353 ft
Warm day (ISA +10)	2,391 ft	2,904 ft	2,362 ft	3,543 ft
Hot day (ISA +20)	3,591 ft	3,138 ft	2,489 ft	3,733 ft
35°C afternoon	3,877 ft	3,194 ft	2,519 ft	3,779 ft

Planning aid only. Even on a 35°C afternoon the longest runway (10/28, 5,504 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,779 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 K4I3 is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KCMH John Glenn Columbus International Airport	26 nm SW	10,114 ft
KDLZ Delaware Municipal Airport	27 nm W	5,800 ft
KOSU The Ohio State University Airport - Don Scott Field	29 nm SW	5,004 ft
KMFD Mansfield Lahm Regional Airport	30 nm N	9,001 ft
KMNN Marion Municipal Airport	30 nm NW	5,000 ft
I40 Richard Downing Airport	31 nm E	5,001 ft

04Jet A prices and FBOs at K4I3

No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at K4I3, 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 K4I3 or read what a fuel stop actually saves.

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