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KEF to SEA: distance & flight time
Keflavik (Keflavik International Airport) → Seattle (Seattle Tacoma International Airport)
3,611 mi
5,811 km · 3,138 nm
7h 33m
estimated nonstop flight time
-7h
time difference · heading northwest
See live KEF→SEA fares Phone-only fares on this route — call free
Flight time details
3,611 miles nonstop takes roughly 7h 33m 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
- SEA — Seattle Tacoma 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 SEA
- RNT · Renton Municipal Airport5 mi away
- BFI · Boeing Field King County International Airport6 mi away
- TIW · Tacoma Narrows Airport18 mi away
- PWT · Bremerton National Airport21 mi away
Frequently asked questions
How far is KEF from SEA?
The flight distance from Keflavik (KEF) to Seattle (SEA) is 3,611 miles (5,811 km, 3,138 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KEF to SEA?
A nonstop flight takes about 7h 33m 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 SEA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KEF–SEA that never appear on search engines, with no booking fees.