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SLC to BFI: distance & flight time
Salt Lake City (Salt Lake City International Airport) → Seattle (Boeing Field King County International Airport)
691 mi
1,112 km · 600 nm
1h 58m
estimated nonstop flight time
-1h
time difference · heading northwest
See live SLC→BFI fares Phone-only fares on this route — call free
Flight time details
691 miles nonstop takes roughly 1h 58m 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
- SLC — Salt Lake City International Airport · Salt Lake City, 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 SLC
- HIF · Hill Air Force Base23 mi away
- OGD · Ogden Hinckley Airport28 mi away
- PVU · Provo Municipal Airport42 mi away
- BMC · Brigham City Regional Airport53 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 SLC from BFI?
The flight distance from Salt Lake City (SLC) to Seattle (BFI) is 691 miles (1,112 km, 600 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SLC to BFI?
A nonstop flight takes about 1h 58m 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 Salt Lake City and Seattle?
Seattle is 1 hour behind Salt Lake City.
What is the cheapest way to fly from SLC to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SLC–BFI that never appear on search engines, with no booking fees.