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ZBY to USM: distance & flight time
Sainyabuli (Sayaboury Airport) → Ko Samui (Samui Airport)
679 mi
1,093 km · 590 nm
1h 57m
estimated nonstop flight time
—
time difference · heading south
See live ZBY→USM fares Phone-only fares on this route — call free
Flight time details
679 miles nonstop takes roughly 1h 57m 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
- ZBY — Sayaboury Airport · Sainyabuli, Laos
- 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 ZBY
- LPQ · Luang Phabang International Airport54 mi away
- NNT · Nan Airport68 mi away
- XKH · Xieng Khouang Airport96 mi away
- ODY · Oudomsay Airport101 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 ZBY from USM?
The flight distance from Sainyabuli (ZBY) to Ko Samui (USM) is 679 miles (1,093 km, 590 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ZBY to USM?
A nonstop flight takes about 1h 57m 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 ZBY to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ZBY–USM that never appear on search engines, with no booking fees.