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BFI to YSP: distance & flight time
Seattle (Boeing Field King County International Airport) → Marathon (Marathon Airport)
1,645 mi
2,647 km · 1,429 nm
3h 41m
estimated nonstop flight time
+3h
time difference · heading east
See live BFI→YSP fares Phone-only fares on this route — call free
Flight time details
1,645 miles nonstop takes roughly 3h 41m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time gain when reading arrival times on your ticket.
The two airports
- BFI — Boeing Field King County International Airport · Seattle, United States
- YSP — Marathon Airport · Marathon, 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 YSP
- YMG · Manitouwadge Airport32 mi away
- YGQ · Geraldton Greenstone Regional Airport76 mi away
- YHN · Hornepayne Municipal Airport78 mi away
- YXZ · Wawa Airport90 mi away
Frequently asked questions
How far is BFI from YSP?
The flight distance from Seattle (BFI) to Marathon (YSP) is 1,645 miles (2,647 km, 1,429 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BFI to YSP?
A nonstop flight takes about 3h 41m 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 Seattle and Marathon?
Marathon is 3 hours ahead of Seattle.
What is the cheapest way to fly from BFI to YSP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BFI–YSP that never appear on search engines, with no booking fees.