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OSY to BFI: distance & flight time
Namsos (Namsos Høknesøra Airport) → Seattle (Boeing Field King County International Airport)
4,309 mi
6,934 km · 3,744 nm
8h 55m
estimated nonstop flight time
-9h
time difference · heading northwest
See live OSY→BFI fares Phone-only fares on this route — call free
Flight time details
4,309 miles nonstop takes roughly 8h 55m 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
- OSY — Namsos Høknesøra Airport · Namsos, 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 OSY
- RVK · Rørvik Airport, Ryum28 mi away
- BNN · Brønnøysund Airport71 mi away
- TRD · Trondheim Airport Værnes73 mi away
- OLA · Ørland Airport80 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 OSY from BFI?
The flight distance from Namsos (OSY) to Seattle (BFI) is 4,309 miles (6,934 km, 3,744 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSY to BFI?
A nonstop flight takes about 8h 55m 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 Namsos and Seattle?
Seattle is 9 hours behind Namsos.
What is the cheapest way to fly from OSY to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSY–BFI that never appear on search engines, with no booking fees.