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OSN to KCZ: distance & flight time
Osan (Osan Air Base) → Kochi (Kōchi Ryōma Airport)
447 mi
720 km · 389 nm
1h 26m
estimated nonstop flight time
Same time
time difference · heading southeast
See live OSN→KCZ fares Phone-only fares on this route — call free
Flight time details
447 miles nonstop takes roughly 1h 26m gate to gate, flying southeast. 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
- OSN — Osan Air Base · Osan, South Korea
- KCZ — Kōchi Ryōma Airport · Kochi, Japan
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 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
Near KCZ
- TAK · Takamatsu Airport50 mi away
- MYJ · Matsuyama Airport59 mi away
- TKS · Tokushima Airport/JMSDF Air Base67 mi away
- HIJ · Hiroshima Airport75 mi away
Frequently asked questions
How far is OSN from KCZ?
The flight distance from Osan (OSN) to Kochi (KCZ) is 447 miles (720 km, 389 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to KCZ?
A nonstop flight takes about 1h 26m 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 OSN to KCZ?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–KCZ that never appear on search engines, with no booking fees.