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STK to BFI: distance & flight time
Sterling (Sterling Municipal Airport) → Seattle (Boeing Field King County International Airport)
1,055 mi
1,698 km · 917 nm
2h 46m
estimated nonstop flight time
-1h
time difference · heading northwest
See live STK→BFI fares Phone-only fares on this route — call free
Flight time details
1,055 miles nonstop takes roughly 2h 46m 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
- STK — Sterling Municipal Airport · Sterling, 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 STK
- AKO · Colorado Plains Regional Airport30 mi away
- SNY · Sidney Municipal-Lloyd W Carr Field37 mi away
- DEN · Denver International Airport91 mi away
- GXY · Greeley–Weld County Airport73 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 STK from BFI?
The flight distance from Sterling (STK) to Seattle (BFI) is 1,055 miles (1,698 km, 917 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from STK to BFI?
A nonstop flight takes about 2h 46m 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 Sterling and Seattle?
Seattle is 1 hour behind Sterling.
What is the cheapest way to fly from STK to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on STK–BFI that never appear on search engines, with no booking fees.