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BFI to YSL: distance & flight time
Seattle (Boeing Field King County International Airport) → St Leonard (St Leonard Airport)
2,496 mi
4,017 km · 2,169 nm
5h 22m
estimated nonstop flight time
—
time difference · heading east
See live BFI→YSL fares Phone-only fares on this route — call free
Flight time details
2,496 miles nonstop takes roughly 5h 22m gate to gate, flying east. 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
- BFI — Boeing Field King County International Airport · Seattle, United States
- YSL — St Leonard Airport · St Leonard, Canada
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 BFI
- SEA · Seattle Tacoma International Airport6 mi away
- RNT · Renton Municipal Airport5 mi away
- PWT · Bremerton National Airport22 mi away
- TIW · Tacoma Narrows Airport22 mi away
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
Frequently asked questions
How far is BFI from YSL?
The flight distance from Seattle (BFI) to St Leonard (YSL) is 2,496 miles (4,017 km, 2,169 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BFI to YSL?
A nonstop flight takes about 5h 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 cheapest way to fly from BFI to YSL?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BFI–YSL that never appear on search engines, with no booking fees.