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BTM to USM: distance & flight time
Butte (Bert Mooney Airport) → Ko Samui (Samui Airport)
8,105 mi
13,043 km · 7,043 nm
16h 21m
estimated nonstop flight time
+13h
time difference · heading northwest
See live BTM→USM fares Phone-only fares on this route — call free
Flight time details
8,105 miles nonstop takes roughly 16h 21m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 13-hour time gain when reading arrival times on your ticket.
The two airports
- BTM — Bert Mooney Airport · Butte, 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 BTM
- HLN · Helena Regional Airport51 mi away
- BZN · Gallatin Field66 mi away
- SMN · Lemhi County Airport88 mi away
- LVM · Mission Field100 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 BTM from USM?
The flight distance from Butte (BTM) to Ko Samui (USM) is 8,105 miles (13,043 km, 7,043 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BTM to USM?
A nonstop flight takes about 16h 21m 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 Butte and Ko Samui?
Ko Samui is 13 hours ahead of Butte.
What is the cheapest way to fly from BTM to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BTM–USM that never appear on search engines, with no booking fees.