KMRT · Union County Airport

MARYSVILLE, OHIO · SMALL AIRPORT

1,021

Elevation ft

Runway

4,218

Longest ft · 09/27

40.22N

83.35W

Union County Airport serves Marysville, Ohio at 1,021 ft elevation with its longest runway, 09/27, at 4,218 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.

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

01Runways

Runway	Length × width	Surface	Lighting
09/27	4,218 × 75 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 1,021 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)	1,021 ft	2,637 ft	2,218 ft	3,327 ft
Warm day (ISA +10)	2,221 ft	2,871 ft	2,344 ft	3,516 ft
Hot day (ISA +20)	3,421 ft	3,105 ft	2,471 ft	3,706 ft
35°C afternoon	3,666 ft	3,153 ft	2,497 ft	3,745 ft

Planning aid only. Even on a 35°C afternoon the longest runway (09/27, 4,218 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,745 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 KMRT is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KDLZ Delaware Municipal Airport	11 nm E	5,800 ft
KOSU The Ohio State University Airport - Don Scott Field	15 nm SE	5,004 ft
KTZR Bolton Field	22 nm SE	5,500 ft
KEDJ Bellefontaine Regional Airport	23 nm NW	5,000 ft
KCMH John Glenn Columbus International Airport	25 nm SE	10,114 ft
KMNN Marion Municipal Airport	27 nm NE	5,000 ft

04Jet A prices and FBOs at KMRT

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

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