Need help booking?
Unpublished phone-only deals available
RKE to BFI: distance & flight time
Copenhagen (Copenhagen Roskilde Airport) → Seattle (Boeing Field King County International Airport)
4,839 mi
7,788 km · 4,205 nm
9h 57m
estimated nonstop flight time
-9h
time difference · heading northwest
See live RKE→BFI fares Phone-only fares on this route — call free
Flight time details
4,839 miles nonstop takes roughly 9h 57m 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
- RKE — Copenhagen Roskilde Airport · Copenhagen, Denmark
- 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 RKE
- CPH · Copenhagen Kastrup Airport21 mi away
- MMX · Malmö Sturup Airport49 mi away
- AGH · Ängelholm-Helsingborg Airport56 mi away
- MRW · Lolland Falster Maribo Airport67 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 RKE from BFI?
The flight distance from Copenhagen (RKE) to Seattle (BFI) is 4,839 miles (7,788 km, 4,205 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RKE to BFI?
A nonstop flight takes about 9h 57m 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 Copenhagen and Seattle?
Seattle is 9 hours behind Copenhagen.
What is the cheapest way to fly from RKE to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RKE–BFI that never appear on search engines, with no booking fees.