Need help booking?
Unpublished phone-only deals available
BIL to USM: distance & flight time
Billings (Billings Logan International Airport) → Ko Samui (Samui Airport)
8,221 mi
13,231 km · 7,144 nm
16h 35m
estimated nonstop flight time
+13h
time difference · heading northwest
See live BIL→USM fares Phone-only fares on this route — call free
Flight time details
8,221 miles nonstop takes roughly 16h 35m 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
- BIL — Billings Logan International Airport · Billings, 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 BIL
- COD · Yellowstone Regional Airport92 mi away
- LVM · Mission Field92 mi away
- LWT · Lewistown Municipal Airport96 mi away
- SHR · Sheridan County Airport105 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 BIL from USM?
The flight distance from Billings (BIL) to Ko Samui (USM) is 8,221 miles (13,231 km, 7,144 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BIL to USM?
A nonstop flight takes about 16h 35m 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 Billings and Ko Samui?
Ko Samui is 13 hours ahead of Billings.
What is the cheapest way to fly from BIL to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BIL–USM that never appear on search engines, with no booking fees.