KGAI · Montgomery County Airpark

GAITHERSBURG, MARYLAND · SMALL AIRPORT

539

Elevation ft

Runway

4,202

Longest ft · 14/32

39.17N

77.17W

Montgomery County Airpark serves Gaithersburg, Maryland at 539 ft elevation with its longest runway, 14/32, at 4,202 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 KGAI in JetDesk: live METAR, TAF, winds and runway verdict →

01Runways

Runway	Length × width	Surface	Lighting
14/32	4,202 × 75 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 539 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)	539 ft	2,543 ft	2,167 ft	3,250 ft
Warm day (ISA +10)	1,739 ft	2,777 ft	2,293 ft	3,440 ft
Hot day (ISA +20)	2,939 ft	3,011 ft	2,420 ft	3,630 ft
35°C afternoon	3,068 ft	3,036 ft	2,434 ft	3,651 ft

Planning aid only. Even on a 35°C afternoon the longest runway (14/32, 4,202 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (3,651 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 KGAI is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KFDK Frederick Municipal Airport	18 nm NW	5,819 ft
KJYO Leesburg Executive Airport	19 nm W	5,500 ft
KIAD Washington Dulles International Airport	19 nm SW	11,500 ft
KDCA Ronald Reagan Washington National Airport	20 nm S	7,169 ft
KBWI Baltimore/Washington International Thurgood Marshall Airport	23 nm E	10,503 ft

04Jet A prices and FBOs at KGAI

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

All Maryland airports · Airport directory · Open JetDesk