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YUL to USM: distance & flight time
Montreal (Montreal / Pierre Elliott Trudeau International Airport) → Ko Samui (Samui Airport)
8,616 mi
13,866 km · 7,487 nm
17h 22m
estimated nonstop flight time
+11h
time difference · heading north
See live YUL→USM fares Phone-only fares on this route — call free
Flight time details
8,616 miles nonstop takes roughly 17h 22m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 11-hour time gain when reading arrival times on your ticket.
The two airports
- YUL — Montreal / Pierre Elliott Trudeau International Airport · Montreal, Canada
- 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 YUL
- YHU · Montréal / Saint-Hubert Airport16 mi away
- YMX · Montreal International (Mirabel) Airport20 mi away
- YJN · St Jean Airport25 mi away
- YCC · Cornwall Regional Airport48 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 YUL from USM?
The flight distance from Montreal (YUL) to Ko Samui (USM) is 8,616 miles (13,866 km, 7,487 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YUL to USM?
A nonstop flight takes about 17h 22m 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 Montreal and Ko Samui?
Ko Samui is 11 hours ahead of Montreal.
What is the cheapest way to fly from YUL to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YUL–USM that never appear on search engines, with no booking fees.