Need help booking?
Unpublished phone-only deals available
GAJ to OSN: distance & flight time
Yamagata (Yamagata Airport) → Osan (Osan Air Base)
734 mi
1,181 km · 638 nm
2h 4m
estimated nonstop flight time
Same time
time difference · heading west
See live GAJ→OSN fares Phone-only fares on this route — call free
Flight time details
734 miles nonstop takes roughly 2h 4m 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
- GAJ — Yamagata Airport · Yamagata, Japan
- 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 GAJ
- SDJ · Sendai Airport35 mi away
- SYO · Shonai Airport42 mi away
- KIJ · Niigata Airport75 mi away
- HNA · Hanamaki Airport81 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 GAJ from OSN?
The flight distance from Yamagata (GAJ) to Osan (OSN) is 734 miles (1,181 km, 638 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GAJ to OSN?
A nonstop flight takes about 2h 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 cheapest way to fly from GAJ to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GAJ–OSN that never appear on search engines, with no booking fees.