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BFI to LHR: distance & flight time
Seattle (Boeing Field King County International Airport) → London (London Heathrow Airport)
4,781 mi
7,694 km · 4,155 nm
9h 50m
estimated nonstop flight time
+8h
time difference · heading northeast
See live BFI→LHR fares Phone-only fares on this route — call free
Flight time details
4,781 miles nonstop takes roughly 9h 50m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time gain when reading arrival times on your ticket.
The two airports
- BFI — Boeing Field King County International Airport · Seattle, United States
- LHR — London Heathrow Airport · London, United Kingdom
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 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
Near LHR
- LGW · London Gatwick Airport25 mi away
- NHT · RAF Northolt6 mi away
- HYC · Wycombe Air Park18 mi away
- FAB · Farnborough Airport19 mi away
Frequently asked questions
How far is BFI from LHR?
The flight distance from Seattle (BFI) to London (LHR) is 4,781 miles (7,694 km, 4,155 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BFI to LHR?
A nonstop flight takes about 9h 50m 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 Seattle and London?
London is 8 hours ahead of Seattle.
What is the cheapest way to fly from BFI to LHR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BFI–LHR that never appear on search engines, with no booking fees.