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IAD to GAI: distance & flight time
Washington (Washington Dulles International Airport) → Gaithersburg (Montgomery County Airpark)
22 mi
35 km · 19 nm
31m
estimated nonstop flight time
Same time
time difference · heading northeast
See live IAD→GAI fares Phone-only fares on this route — call free
Flight time details
22 miles nonstop takes roughly 31m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- IAD — Washington Dulles International Airport · Washington, 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
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Near IAD
Near GAI
Frequently asked questions
How far is IAD from GAI?
The flight distance from Washington (IAD) to Gaithersburg (GAI) is 22 miles (35 km, 19 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAD to GAI?
A nonstop flight takes about 31m 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 cheapest way to fly from IAD to GAI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAD–GAI that never appear on search engines, with no booking fees.