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IAH to GAI: distance & flight time
Houston (George Bush Intercontinental Houston Airport) → Gaithersburg (Montgomery County Airpark)
1,210 mi
1,947 km · 1,051 nm
3h 6m
estimated nonstop flight time
+1h
time difference · heading northeast
See live IAH→GAI fares Phone-only fares on this route — call free
Flight time details
1,210 miles nonstop takes roughly 3h 6m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- IAH — George Bush Intercontinental Houston Airport · Houston, 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 IAH
- DWH · David Wayne Hooks Memorial Airport14 mi away
- IWS · West Houston Airport23 mi away
- AAP · Andrau Airpark23 mi away
- HOU · William P Hobby Airport24 mi away
Near GAI
Frequently asked questions
How far is IAH from GAI?
The flight distance from Houston (IAH) to Gaithersburg (GAI) is 1,210 miles (1,947 km, 1,051 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAH to GAI?
A nonstop flight takes about 3h 6m 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 Houston and Gaithersburg?
Gaithersburg is 1 hour ahead of Houston.
What is the cheapest way to fly from IAH to GAI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAH–GAI that never appear on search engines, with no booking fees.