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DEF to USM: distance & flight time
Dezful (Dezful Airport) → Ko Samui (Samui Airport)
3,645 mi
5,866 km · 3,167 nm
7h 37m
estimated nonstop flight time
+3.5h
time difference · heading east
See live DEF→USM fares Phone-only fares on this route — call free
Flight time details
3,645 miles nonstop takes roughly 7h 37m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3.5-hour time gain when reading arrival times on your ticket.
The two airports
- DEF — Dezful Airport · Dezful, Iran
- USM — Samui Airport · Ko Samui, Thailand
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 USM
- URT · Surat Thani Airport69 mi away
- NST · Nakhon Si Thammarat Airport70 mi away
- CJM · Chumphon Airport93 mi away
- UNN · Ranong Airport102 mi away
Frequently asked questions
How far is DEF from USM?
The flight distance from Dezful (DEF) to Ko Samui (USM) is 3,645 miles (5,866 km, 3,167 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from DEF to USM?
A nonstop flight takes about 7h 37m 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 Ko Samui?
Ko Samui is 3.5 hours ahead of Dezful.
What is the cheapest way to fly from DEF to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on DEF–USM that never appear on search engines, with no booking fees.