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SEM to USM: distance & flight time
Selma (Craig Field) → Ko Samui (Samui Airport)
9,505 mi
15,297 km · 8,260 nm
19h 6m
estimated nonstop flight time
+12h
time difference · heading north
See live SEM→USM fares Phone-only fares on this route — call free
Flight time details
9,505 miles nonstop takes roughly 19h 6m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time gain when reading arrival times on your ticket.
The two airports
- SEM — Craig Field · Selma, United States
- 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 SEM
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 SEM from USM?
The flight distance from Selma (SEM) to Ko Samui (USM) is 9,505 miles (15,297 km, 8,260 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEM to USM?
A nonstop flight takes about 19h 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 Selma and Ko Samui?
Ko Samui is 12 hours ahead of Selma.
What is the cheapest way to fly from SEM to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEM–USM that never appear on search engines, with no booking fees.