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DEF to GAI: distance & flight time
Dezful (Dezful Airport) → Gaithersburg (Montgomery County Airpark)
6,384 mi
10,274 km · 5,548 nm
12h 59m
estimated nonstop flight time
-7.5h
time difference · heading northwest
See live DEF→GAI fares Phone-only fares on this route — call free
Flight time details
6,384 miles nonstop takes roughly 12h 59m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7.5-hour time set-back when reading arrival times on your ticket.
The two airports
- DEF — Dezful Airport · Dezful, Iran
- 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 DEF
- KHD · Khoram Abad Airport69 mi away
- AWZ · Ahwaz Airport79 mi away
- OMI · Omidiyeh Airport129 mi away
- MRX · Mahshahr Airport137 mi away
Near GAI
Frequently asked questions
How far is DEF from GAI?
The flight distance from Dezful (DEF) to Gaithersburg (GAI) is 6,384 miles (10,274 km, 5,548 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from DEF to GAI?
A nonstop flight takes about 12h 59m 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 Dezful and Gaithersburg?
Gaithersburg is 7.5 hours behind Dezful.
What is the cheapest way to fly from DEF to GAI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on DEF–GAI that never appear on search engines, with no booking fees.