KGAI is the ICAO code for Montgomery County Airpark (IATA GAI), located in Gaithersburg, MD.
Montgomery County Airpark (KGAI) sits in Gaithersburg, Maryland, 20 miles northwest of central DC. The single 4,202 ft runway handles light, midsize, and most super-midsize jets; heavy and ultra-long-range jets typically use KIAD. Field elevation 539 ft, no density-altitude concerns. KGAI serves the Montgomery County / I-270 biotech corridor (NIH, MedImmune, the broader Rockville cluster). Ground time to NIH Bethesda is 25 minutes; downtown DC is 50.
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