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CMB to USM: distance & flight time
Colombo (Bandaranaike International Colombo Airport) → Ko Samui (Samui Airport)
1,389 mi
2,235 km · 1,207 nm
3h 29m
estimated nonstop flight time
+1.5h
time difference · heading east
See live CMB→USM fares Phone-only fares on this route — call free
Flight time details
1,389 miles nonstop takes roughly 3h 29m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1.5-hour time gain when reading arrival times on your ticket.
The two airports
- CMB — Bandaranaike International Colombo Airport · Colombo, Sri Lanka
- 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 CMB
- RML · Colombo Ratmalana Airport25 mi away
- GIU · Sigiriya Air Force Base79 mi away
- ACJ · Anuradhapura Air Force Base86 mi away
- KCT · Koggala Airport87 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 CMB from USM?
The flight distance from Colombo (CMB) to Ko Samui (USM) is 1,389 miles (2,235 km, 1,207 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CMB to USM?
A nonstop flight takes about 3h 29m 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 Colombo and Ko Samui?
Ko Samui is 1.5 hours ahead of Colombo.
What is the cheapest way to fly from CMB to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CMB–USM that never appear on search engines, with no booking fees.