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TNN to OSN: distance & flight time
Tainan (Tainan Airport) → Osan (Osan Air Base)
1,058 mi
1,703 km · 919 nm
2h 46m
estimated nonstop flight time
+1h
time difference · heading north
See live TNN→OSN fares Phone-only fares on this route — call free
Flight time details
1,058 miles nonstop takes roughly 2h 46m 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
- TNN — Tainan Airport · Tainan, 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 TNN
- PIF · Pingtung North Airport25 mi away
- KHH · Kaohsiung International Airport27 mi away
- CYI · Chiayi Airport37 mi away
- WOT · Wang-an 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 TNN from OSN?
The flight distance from Tainan (TNN) to Osan (OSN) is 1,058 miles (1,703 km, 919 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TNN to OSN?
A nonstop flight takes about 2h 46m 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 Tainan and Osan?
Osan is 1 hour ahead of Tainan.
What is the cheapest way to fly from TNN to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TNN–OSN that never appear on search engines, with no booking fees.