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YQS to BFI: distance & flight time
St Thomas (St Thomas Municipal Airport) → Seattle (Boeing Field King County International Airport)
2,010 mi
3,234 km · 1,746 nm
4h 24m
estimated nonstop flight time
—
time difference · heading northwest
See live YQS→BFI fares Phone-only fares on this route — call free
Flight time details
2,010 miles nonstop takes roughly 4h 24m gate to gate, flying northwest. 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
- YQS — St Thomas Municipal Airport · St Thomas, Canada
- BFI — Boeing Field King County International Airport · Seattle, United States
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 YQS
- YXU · London Airport18 mi away
- YCE · Centralia / James T. Field Memorial Aerodrome41 mi away
- YYZ · Lester B. Pearson International Airport97 mi away
- YKF · Waterloo Airport60 mi away
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
Frequently asked questions
How far is YQS from BFI?
The flight distance from St Thomas (YQS) to Seattle (BFI) is 2,010 miles (3,234 km, 1,746 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YQS to BFI?
A nonstop flight takes about 4h 24m 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 YQS to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YQS–BFI that never appear on search engines, with no booking fees.