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GAI to APA: distance & flight time
Gaithersburg (Montgomery County Airpark) → Denver (Centennial Airport)
1,473 mi
2,371 km · 1,280 nm
3h 40m
estimated nonstop flight time
-2h
time difference · heading west
See live GAI→APA fares Phone-only fares on this route — call free
Flight time details
1,473 miles nonstop takes roughly 3h 40m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time set-back when reading arrival times on your ticket.
The two airports
- GAI — Montgomery County Airpark · Gaithersburg, United States
- APA — Centennial Airport · Denver, 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 GAI
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
Frequently asked questions
How far is GAI from APA?
The flight distance from Gaithersburg (GAI) to Denver (APA) 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 GAI to APA?
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 Gaithersburg and Denver?
Denver is 2 hours behind Gaithersburg.
What is the cheapest way to fly from GAI to APA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GAI–APA that never appear on search engines, with no booking fees.