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YCM to USM: distance & flight time
Saint Catherines (Niagara District Airport) → Ko Samui (Samui Airport)
8,793 mi
14,150 km · 7,641 nm
17h 42m
estimated nonstop flight time
+11h
time difference · heading north
See live YCM→USM fares Phone-only fares on this route — call free
Flight time details
8,793 miles nonstop takes roughly 17h 42m 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
- YCM — Niagara District Airport · Saint Catherines, 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 YCM
- YYZ · Lester B. Pearson International Airport41 mi away
- IAG · Niagara Falls International Airport13 mi away
- BUF · Buffalo Niagara International Airport28 mi away
- DU9 · Dunnville Airport31 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 YCM from USM?
The flight distance from Saint Catherines (YCM) to Ko Samui (USM) is 8,793 miles (14,150 km, 7,641 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YCM to USM?
A nonstop flight takes about 17h 42m 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 Saint Catherines and Ko Samui?
Ko Samui is 11 hours ahead of Saint Catherines.
What is the cheapest way to fly from YCM to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YCM–USM that never appear on search engines, with no booking fees.