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Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–CYI that never appear on search engines, with no booking fees.