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YSL to OSN: distance & flight time
St Leonard (St Leonard Airport) → Osan (Osan Air Base)
6,544 mi
10,531 km · 5,686 nm
13h 18m
estimated nonstop flight time
—
time difference · heading north
See live YSL→OSN fares Phone-only fares on this route — call free
Flight time details
6,544 miles nonstop takes roughly 13h 18m 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
- OSN — Osan Air Base · Osan, South Korea
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 OSN
- ICN · Incheon International Airport41 mi away
- SWU · Suwon Airport10 mi away
- SSN · Seoul Air Base (K-16)25 mi away
- GMP · Gimpo International Airport35 mi away
Frequently asked questions
How far is YSL from OSN?
The flight distance from St Leonard (YSL) to Osan (OSN) is 6,544 miles (10,531 km, 5,686 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YSL to OSN?
A nonstop flight takes about 13h 18m 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 OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YSL–OSN that never appear on search engines, with no booking fees.