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KEF to BFI: distance & flight time
Keflavik (Keflavik International Airport) → Seattle (Boeing Field King County International Airport)
3,606 mi
5,804 km · 3,134 nm
7h 32m
estimated nonstop flight time
-7h
time difference · heading northwest
See live KEF→BFI fares Phone-only fares on this route — call free
Flight time details
3,606 miles nonstop takes roughly 7h 32m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-hour time set-back when reading arrival times on your ticket.
The two airports
- KEF — Keflavik International Airport · Keflavik, Iceland
- 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 KEF
- RKV · Reykjavik Airport22 mi away
- GUU · Grundarfjörður Airport72 mi away
- VEY · Vestmannaeyjar Airport81 mi away
- PFJ · Patreksfjörður Airport116 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 KEF from BFI?
The flight distance from Keflavik (KEF) to Seattle (BFI) is 3,606 miles (5,804 km, 3,134 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KEF to BFI?
A nonstop flight takes about 7h 32m 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 Keflavik and Seattle?
Seattle is 7 hours behind Keflavik.
What is the cheapest way to fly from KEF to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KEF–BFI that never appear on search engines, with no booking fees.