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USM to CEI: distance & flight time
Ko Samui (Samui Airport) → Chiang Rai (Chiang Rai International Airport)
719 mi
1,157 km · 625 nm
2h 2m
estimated nonstop flight time
Same time
time difference · heading north
See live USM→CEI fares Phone-only fares on this route — call free
Flight time details
719 miles nonstop takes roughly 2h 2m gate to gate, flying north. 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
- USM — Samui Airport · Ko Samui, Thailand
- CEI — Chiang Rai International Airport · Chiang Rai, 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 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 CEI
- THL · Tachileik Airport37 mi away
- HOE · Ban Huoeisay Airport42 mi away
- MOG · Mong Hsat Airport56 mi away
- KET · Kengtung Airport95 mi away
Frequently asked questions
How far is USM from CEI?
The flight distance from Ko Samui (USM) to Chiang Rai (CEI) is 719 miles (1,157 km, 625 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from USM to CEI?
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.
Are there nonstop flights from USM to CEI?
Nonstop service on USM–CEI depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 2h 2m nonstop estimate.
What is the cheapest way to fly from USM to CEI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on USM–CEI that never appear on search engines, with no booking fees.
Why are some USM to CEI fares phone-only?
Consolidator contracts let us sell certain USM–CEI tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.