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TOS to BFI: distance & flight time
Tromso (Tromsø Airport,) → Seattle (Boeing Field King County International Airport)
4,104 mi
6,605 km · 3,567 nm
8h 31m
estimated nonstop flight time
-9h
time difference · heading northwest
See live TOS→BFI fares Phone-only fares on this route — call free
Flight time details
4,104 miles nonstop takes roughly 8h 31m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time set-back when reading arrival times on your ticket.
The two airports
- TOS — Tromsø Airport, · Tromso, Norway
- 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 TOS
- BDU · Bardufoss Airport44 mi away
- SOJ · Sørkjosen Airport49 mi away
- ANX · Andøya Airport72 mi away
- HAA · Hasvik Airport94 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 TOS from BFI?
The flight distance from Tromso (TOS) to Seattle (BFI) is 4,104 miles (6,605 km, 3,567 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TOS to BFI?
A nonstop flight takes about 8h 31m 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 Tromso and Seattle?
Seattle is 9 hours behind Tromso.
What is the cheapest way to fly from TOS to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TOS–BFI that never appear on search engines, with no booking fees.