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CYI to OSN: distance & flight time
Chiayi (Chiayi Airport) → Osan (Osan Air Base)
1,021 mi
1,643 km · 887 nm
2h 41m
estimated nonstop flight time
+1h
time difference · heading north
See live CYI→OSN fares Phone-only fares on this route — call free
Flight time details
1,021 miles nonstop takes roughly 2h 41m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- CYI — Chiayi Airport · Chiayi, Taiwan
- 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 CYI
- TNN · Tainan Airport37 mi away
- MZG · Makung Airport49 mi away
- PIF · Pingtung North Airport53 mi away
- TXG · Taichung Airport53 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 CYI from OSN?
The flight distance from Chiayi (CYI) to Osan (OSN) is 1,021 miles (1,643 km, 887 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CYI to OSN?
A nonstop flight takes about 2h 41m 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 Chiayi and Osan?
Osan is 1 hour ahead of Chiayi.
What is the cheapest way to fly from CYI to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CYI–OSN that never appear on search engines, with no booking fees.