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TWF to BFI: distance & flight time
Twin Falls (Joslin Field Magic Valley Regional Airport) → Seattle (Boeing Field King County International Airport)
517 mi
831 km · 449 nm
1h 35m
estimated nonstop flight time
-1h
time difference · heading northwest
See live TWF→BFI fares Phone-only fares on this route — call free
Flight time details
517 miles nonstop takes roughly 1h 35m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- TWF — Joslin Field Magic Valley Regional Airport · Twin Falls, United States
- 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 TWF
- BYI · Burley Municipal Airport37 mi away
- SUN · Friedman Memorial Airport71 mi away
- MUO · Mountain Home Air Force Base80 mi away
- PIH · Pocatello Regional Airport101 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 TWF from BFI?
The flight distance from Twin Falls (TWF) to Seattle (BFI) is 517 miles (831 km, 449 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TWF to BFI?
A nonstop flight takes about 1h 35m 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 Twin Falls and Seattle?
Seattle is 1 hour behind Twin Falls.
What is the cheapest way to fly from TWF to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TWF–BFI that never appear on search engines, with no booking fees.