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STS to BFI: distance & flight time
Santa Rosa (Charles M. Schulz Sonoma County Airport) → Seattle (Boeing Field King County International Airport)
624 mi
1,004 km · 542 nm
1h 49m
estimated nonstop flight time
Same time
time difference · heading north
See live STS→BFI fares Phone-only fares on this route — call free
Flight time details
624 miles nonstop takes roughly 1h 49m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- STS — Charles M. Schulz Sonoma County Airport · Santa Rosa, 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 STS
- SFO · San Francisco International Airport66 mi away
- NOT · Marin County Airport - Gnoss Field29 mi away
- APC · Napa County Airport35 mi away
- UKI · Ukiah Municipal Airport47 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 STS from BFI?
The flight distance from Santa Rosa (STS) to Seattle (BFI) is 624 miles (1,004 km, 542 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from STS to BFI?
A nonstop flight takes about 1h 49m 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 cheapest way to fly from STS to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on STS–BFI that never appear on search engines, with no booking fees.