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APA to GAI: distance & flight time
Denver (Centennial Airport) → Gaithersburg (Montgomery County Airpark)
1,473 mi
2,371 km · 1,280 nm
3h 40m
estimated nonstop flight time
+2h
time difference · heading east
See live APA→GAI fares Phone-only fares on this route — call free
Flight time details
1,473 miles nonstop takes roughly 3h 40m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time gain when reading arrival times on your ticket.
The two airports
- APA — Centennial Airport · Denver, United States
- GAI — Montgomery County Airpark · Gaithersburg, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near APA
- DEN · Denver International Airport22 mi away
- BFK · Buckley Air Force Base10 mi away
- BJC · Rocky Mountain Metropolitan Airport27 mi away
- WBU · Boulder Municipal Airport38 mi away
Near GAI
Frequently asked questions
How far is APA from GAI?
The flight distance from Denver (APA) to Gaithersburg (GAI) is 1,473 miles (2,371 km, 1,280 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from APA to GAI?
A nonstop flight takes about 3h 40m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Denver and Gaithersburg?
Gaithersburg is 2 hours ahead of Denver.
What is the cheapest way to fly from APA to GAI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on APA–GAI that never appear on search engines, with no booking fees.