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KSO to SEA: distance & flight time
Kastoria (Kastoria National Airport) → Seattle (Seattle Tacoma International Airport)
5,966 mi
9,601 km · 5,184 nm
12h 10m
estimated nonstop flight time
-10h
time difference · heading northwest
See live KSO→SEA fares Phone-only fares on this route — call free
Flight time details
5,966 miles nonstop takes roughly 12h 10m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 10-hour time set-back when reading arrival times on your ticket.
The two airports
- KSO — Kastoria National Airport · Kastoria, Greece
- SEA — Seattle Tacoma 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 KSO
- KZI · Filippos Airport31 mi away
- IOA · Ioannina Airport57 mi away
- OHD · Ohrid St. Paul the Apostle Airport58 mi away
- LRA · Larisa Airport83 mi away
Near SEA
- RNT · Renton Municipal Airport5 mi away
- BFI · Boeing Field King County International Airport6 mi away
- TIW · Tacoma Narrows Airport18 mi away
- PWT · Bremerton National Airport21 mi away
Frequently asked questions
How far is KSO from SEA?
The flight distance from Kastoria (KSO) to Seattle (SEA) is 5,966 miles (9,601 km, 5,184 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KSO to SEA?
A nonstop flight takes about 12h 10m 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 Kastoria and Seattle?
Seattle is 10 hours behind Kastoria.
What is the cheapest way to fly from KSO to SEA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KSO–SEA that never appear on search engines, with no booking fees.