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USM to CMB: distance & flight time
Ko Samui (Samui Airport) → Colombo (Bandaranaike International Colombo Airport)
1,389 mi
2,235 km · 1,207 nm
3h 29m
estimated nonstop flight time
-1.5h
time difference · heading west
See live USM→CMB fares Phone-only fares on this route — call free
Flight time details
1,389 miles nonstop takes roughly 3h 29m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1.5-hour time set-back when reading arrival times on your ticket.
The two airports
- USM — Samui Airport · Ko Samui, Thailand
- CMB — Bandaranaike International Colombo Airport · Colombo, Sri Lanka
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 USM
- URT · Surat Thani Airport69 mi away
- NST · Nakhon Si Thammarat Airport70 mi away
- CJM · Chumphon Airport93 mi away
- UNN · Ranong Airport102 mi away
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
Frequently asked questions
How far is USM from CMB?
The flight distance from Ko Samui (USM) to Colombo (CMB) 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 USM to CMB?
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 Ko Samui and Colombo?
Colombo is 1.5 hours behind Ko Samui.
What is the cheapest way to fly from USM to CMB?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on USM–CMB that never appear on search engines, with no booking fees.