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KFS to OSN: distance & flight time
Kastamonu (Kastamonu Airport) → Osan (Osan Air Base)
4,742 mi
7,632 km · 4,121 nm
9h 46m
estimated nonstop flight time
+6h
time difference · heading northeast
See live KFS→OSN fares Phone-only fares on this route — call free
Flight time details
4,742 miles nonstop takes roughly 9h 46m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time gain when reading arrival times on your ticket.
The two airports
- KFS — Kastamonu Airport · Kastamonu, Turkey
- OSN — Osan Air Base · Osan, South Korea
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 KFS
- NOP · Sinop Airport82 mi away
- ONQ · Zonguldak Airport89 mi away
- ESB · Esenboğa International Airport92 mi away
- MZH · Amasya Merzifon Airport96 mi away
Near OSN
- ICN · Incheon International Airport41 mi away
- SWU · Suwon Airport10 mi away
- SSN · Seoul Air Base (K-16)25 mi away
- GMP · Gimpo International Airport35 mi away
Frequently asked questions
How far is KFS from OSN?
The flight distance from Kastamonu (KFS) to Osan (OSN) is 4,742 miles (7,632 km, 4,121 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KFS to OSN?
A nonstop flight takes about 9h 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 Kastamonu and Osan?
Osan is 6 hours ahead of Kastamonu.
What is the cheapest way to fly from KFS to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KFS–OSN that never appear on search engines, with no booking fees.