Need help booking?
Unpublished phone-only deals available
KES to BFI: distance & flight time
Kelsey (Kelsey Airport) → Seattle (Boeing Field King County International Airport)
1,239 mi
1,994 km · 1,077 nm
3h 10m
estimated nonstop flight time
—
time difference · heading west
See live KES→BFI fares Phone-only fares on this route — call free
Flight time details
1,239 miles nonstop takes roughly 3h 10m gate to gate, flying west. 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
- KES — Kelsey Airport · Kelsey, Canada
- 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 KES
- ZAC · York Landing Airport17 mi away
- ILF · Ilford Airport35 mi away
- PIW · Pikwitonei Airport40 mi away
- YTH · Thompson Airport55 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 KES from BFI?
The flight distance from Kelsey (KES) to Seattle (BFI) is 1,239 miles (1,994 km, 1,077 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KES to BFI?
A nonstop flight takes about 3h 10m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from KES to BFI?
Nonstop service on KES–BFI depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 3h 10m nonstop estimate.
What is the cheapest way to fly from KES to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KES–BFI that never appear on search engines, with no booking fees.
Why are some KES to BFI fares phone-only?
Consolidator contracts let us sell certain KES–BFI tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.