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THL to OSN: distance & flight time
Tachilek (Tachileik Airport) → Osan (Osan Air Base)
1,990 mi
3,203 km · 1,729 nm
4h 22m
estimated nonstop flight time
+2.5h
time difference · heading northeast
See live THL→OSN fares Phone-only fares on this route — call free
Flight time details
1,990 miles nonstop takes roughly 4h 22m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2.5-hour time gain when reading arrival times on your ticket.
The two airports
- THL — Tachileik Airport · Tachilek, Burma
- 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 THL
- HOE · Ban Huoeisay Airport36 mi away
- CEI · Chiang Rai International Airport37 mi away
- MOG · Mong Hsat Airport44 mi away
- KET · Kengtung Airport60 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 THL from OSN?
The flight distance from Tachilek (THL) to Osan (OSN) is 1,990 miles (3,203 km, 1,729 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from THL to OSN?
A nonstop flight takes about 4h 22m 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 Tachilek and Osan?
Osan is 2.5 hours ahead of Tachilek.
What is the cheapest way to fly from THL to OSN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on THL–OSN that never appear on search engines, with no booking fees.