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GCK to OSN: distance & flight time
Garden City (Garden City Regional Airport) → Osan (Osan Air Base)
6,426 mi
10,341 km · 5,584 nm
13h 4m
estimated nonstop flight time
+14h
time difference · heading northwest
See live GCK→OSN fares Phone-only fares on this route — call free
Flight time details
6,426 miles nonstop takes roughly 13h 4m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- GCK — Garden City Regional Airport · Garden City, United States
- 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 GCK
- DDC · Dodge City Regional Airport43 mi away
- LBL · Liberal Mid-America Regional Airport62 mi away
- GUY · Guymon Municipal Airport96 mi away
- HYS · Hays Regional Airport101 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 GCK from OSN?
The flight distance from Garden City (GCK) to Osan (OSN) is 6,426 miles (10,341 km, 5,584 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GCK to OSN?
A nonstop flight takes about 13h 4m 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 Garden City and Osan?
Osan is 14 hours ahead of Garden City.
What is the cheapest way to fly from GCK to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GCK–OSN that never appear on search engines, with no booking fees.