36IS in 20 seconds
Gillen Airport serves Monmouth, US.
AirportRoutes · updated Feb 16, 2026
Traveler reviews & tips
From people who've recently flown through Monmouth.
Rate this airport:
No tips for 36IS yet — be the first to help fellow travelers.
Share your tip or review
Help fellow travelers at Gillen Airport. Tips are reviewed before publishing.
Common questions about 36IS
Quick answers, straight from the schedule data.
Where is Gillen Airport located?
Gillen Airport is located in Monmouth, US, at an elevation of 750 ft. Its IATA code is — and ICAO code is 36IS.