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THN to BFI: distance & flight time
Trollhattan (Trollhättan-Vänersborg Airport) → Seattle (Boeing Field King County International Airport)
4,682 mi
7,534 km · 4,068 nm
9h 39m
estimated nonstop flight time
-9h
time difference · heading northwest
See live THN→BFI fares Phone-only fares on this route — call free
Flight time details
4,682 miles nonstop takes roughly 9h 39m 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
- THN — Trollhättan-Vänersborg Airport · Trollhattan, Sweden
- 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 THN
- LDK · Lidköping-Hovby Airport32 mi away
- GSE · Gothenburg City Airport41 mi away
- GOT · Gothenburg-Landvetter Airport45 mi away
- KVB · Skövde Airport60 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 THN from BFI?
The flight distance from Trollhattan (THN) to Seattle (BFI) is 4,682 miles (7,534 km, 4,068 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from THN to BFI?
A nonstop flight takes about 9h 39m 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 Trollhattan and Seattle?
Seattle is 9 hours behind Trollhattan.
What is the cheapest way to fly from THN to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on THN–BFI that never appear on search engines, with no booking fees.