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ATY to USM: distance & flight time
Watertown (Watertown Regional Airport) → Ko Samui (Samui Airport)
8,524 mi
13,717 km · 7,407 nm
17h 11m
estimated nonstop flight time
+12h
time difference · heading north
See live ATY→USM fares Phone-only fares on this route — call free
Flight time details
8,524 miles nonstop takes roughly 17h 11m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time gain when reading arrival times on your ticket.
The two airports
- ATY — Watertown Regional Airport · Watertown, United States
- 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 ATY
- HON · Huron Regional Airport64 mi away
- ABR · Aberdeen Regional Airport72 mi away
- MHE · Mitchell Municipal Airport90 mi away
- FSD · Joe Foss Field Airport94 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 ATY from USM?
The flight distance from Watertown (ATY) to Ko Samui (USM) is 8,524 miles (13,717 km, 7,407 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ATY to USM?
A nonstop flight takes about 17h 11m 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 Watertown and Ko Samui?
Ko Samui is 12 hours ahead of Watertown.
What is the cheapest way to fly from ATY to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ATY–USM that never appear on search engines, with no booking fees.