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SMN to BFI: distance & flight time
Salmon (Lemhi County Airport) → Seattle (Boeing Field King County International Airport)
435 mi
699 km · 378 nm
1h 25m
estimated nonstop flight time
-1h
time difference · heading northwest
See live SMN→BFI fares Phone-only fares on this route — call free
Flight time details
435 miles nonstop takes roughly 1h 25m 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
- SMN — Lemhi County Airport · Salmon, 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 SMN
- BTM · Bert Mooney Airport88 mi away
- MYL · McCall Municipal Airport110 mi away
- SUN · Friedman Memorial Airport114 mi away
- MSO · Missoula International Airport124 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 SMN from BFI?
The flight distance from Salmon (SMN) to Seattle (BFI) is 435 miles (699 km, 378 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SMN to BFI?
A nonstop flight takes about 1h 25m 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 Salmon and Seattle?
Seattle is 1 hour behind Salmon.
What is the cheapest way to fly from SMN to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SMN–BFI that never appear on search engines, with no booking fees.