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BFI to KSJ: distance & flight time
Seattle (Boeing Field King County International Airport) → Kasos (Kasos Airport)
6,397 mi
10,295 km · 5,559 nm
13h 1m
estimated nonstop flight time
+10h
time difference · heading northeast
See live BFI→KSJ fares Phone-only fares on this route — call free
Flight time details
6,397 miles nonstop takes roughly 13h 1m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 10-hour time gain when reading arrival times on your ticket.
The two airports
- BFI — Boeing Field King County International Airport · Seattle, United States
- KSJ — Kasos Airport · Kasos, Greece
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 KSJ
- AOK · Karpathos Airport13 mi away
- JSH · Sitia Airport48 mi away
- JTY · Astypalaia Airport85 mi away
- KGS · Kos Airport95 mi away
Frequently asked questions
How far is BFI from KSJ?
The flight distance from Seattle (BFI) to Kasos (KSJ) is 6,397 miles (10,295 km, 5,559 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BFI to KSJ?
A nonstop flight takes about 13h 1m 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 Kasos?
Kasos is 10 hours ahead of Seattle.
What is the cheapest way to fly from BFI to KSJ?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BFI–KSJ that never appear on search engines, with no booking fees.