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USM to CNX: distance & flight time
Ko Samui (Samui Airport) → Chiang Mai (Chiang Mai International Airport)
641 mi
1,032 km · 557 nm
1h 52m
estimated nonstop flight time
Same time
time difference · heading north
See live USM→CNX fares Phone-only fares on this route — call free
Flight time details
641 miles nonstop takes roughly 1h 52m 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
- CNX — Chiang Mai International Airport · Chiang Mai, 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 CNX
- LPT · Lampang Airport49 mi away
- PYY · Mae Hong Son Airport54 mi away
- HGN · Mae Hong Son Airport74 mi away
- PRH · Phrae Airport90 mi away
Frequently asked questions
How far is USM from CNX?
The flight distance from Ko Samui (USM) to Chiang Mai (CNX) is 641 miles (1,032 km, 557 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from USM to CNX?
A nonstop flight takes about 1h 52m 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 USM to CNX?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on USM–CNX that never appear on search engines, with no booking fees.