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SXI to USM: distance & flight time
Siri Island (Sirri Island Airport) → Ko Samui (Samui Airport)
3,182 mi
5,121 km · 2,765 nm
6h 42m
estimated nonstop flight time
+3.5h
time difference · heading east
See live SXI→USM fares Phone-only fares on this route — call free
Flight time details
3,182 miles nonstop takes roughly 6h 42m 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
- SXI — Sirri Island Airport · Siri Island, 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 SXI
- DXB · Dubai International Airport69 mi away
- AEU · Abu Musa Island Airport31 mi away
- BDH · Bandar Lengeh Airport47 mi away
- KIH · Kish International Airport55 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 SXI from USM?
The flight distance from Siri Island (SXI) to Ko Samui (USM) is 3,182 miles (5,121 km, 2,765 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SXI to USM?
A nonstop flight takes about 6h 42m 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 Siri Island and Ko Samui?
Ko Samui is 3.5 hours ahead of Siri Island.
What is the cheapest way to fly from SXI to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SXI–USM that never appear on search engines, with no booking fees.