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CEI to USM: distance & flight time
Chiang Rai (Chiang Rai International Airport) → Ko Samui (Samui Airport)
719 mi
1,157 km · 625 nm
2h 2m
estimated nonstop flight time
Same time
time difference · heading south
See live CEI→USM fares Phone-only fares on this route — call free
Flight time details
719 miles nonstop takes roughly 2h 2m gate to gate, flying south. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- CEI — Chiang Rai International Airport · Chiang Rai, Thailand
- 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 CEI
- THL · Tachileik Airport37 mi away
- HOE · Ban Huoeisay Airport42 mi away
- MOG · Mong Hsat Airport56 mi away
- KET · Kengtung Airport95 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 CEI from USM?
The flight distance from Chiang Rai (CEI) to Ko Samui (USM) is 719 miles (1,157 km, 625 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CEI to USM?
A nonstop flight takes about 2h 2m 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 cheapest way to fly from CEI to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CEI–USM that never appear on search engines, with no booking fees.