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BFI to SPF: distance & flight time
Seattle (Boeing Field King County International Airport) → Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field)
911 mi
1,466 km · 792 nm
2h 27m
estimated nonstop flight time
+1h
time difference · heading east
See live BFI→SPF fares Phone-only fares on this route — call free
Flight time details
911 miles nonstop takes roughly 2h 27m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- BFI — Boeing Field King County International Airport · Seattle, United States
- SPF — Black Hills Airport-Clyde Ice Field · Spearfish-South Dakota, 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 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 SPF
- RCA · Ellsworth Air Force Base41 mi away
- RAP · Rapid City Regional Airport47 mi away
- GCC · Gillette Campbell County Airport87 mi away
- CDR · Chadron Municipal Airport119 mi away
Frequently asked questions
How far is BFI from SPF?
The flight distance from Seattle (BFI) to Spearfish-South Dakota (SPF) is 911 miles (1,466 km, 792 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BFI to SPF?
A nonstop flight takes about 2h 27m 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 Spearfish-South Dakota?
Spearfish-South Dakota is 1 hour ahead of Seattle.
What is the cheapest way to fly from BFI to SPF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BFI–SPF that never appear on search engines, with no booking fees.