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YSL to USM: distance & flight time
St Leonard (St Leonard Airport) → Ko Samui (Samui Airport)
8,449 mi
13,597 km · 7,342 nm
17h 2m
estimated nonstop flight time
—
time difference · heading north
See live YSL→USM fares Phone-only fares on this route — call free
Flight time details
8,449 miles nonstop takes roughly 17h 2m 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
- YSL — St Leonard Airport · St Leonard, 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 YSL
- CAR · Caribou Municipal Airport22 mi away
- WFK · Northern Aroostook Regional Airport24 mi away
- PQI · Northern Maine Regional Airport at Presque Isle34 mi away
- HUL · Houlton International Airport71 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 YSL from USM?
The flight distance from St Leonard (YSL) to Ko Samui (USM) is 8,449 miles (13,597 km, 7,342 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YSL to USM?
A nonstop flight takes about 17h 2m 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 YSL to USM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YSL–USM that never appear on search engines, with no booking fees.