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THL to USN: distance & flight time
Tachilek (Tachileik Airport) → Ulsan (Ulsan Airport)
2,063 mi
3,321 km · 1,793 nm
4h 31m
estimated nonstop flight time
+2.5h
time difference · heading northeast
See live THL→USN fares Phone-only fares on this route — call free
Flight time details
2,063 miles nonstop takes roughly 4h 31m 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
- USN — Ulsan Airport · Ulsan, 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 USN
- KPO · Pohang Airport (G-815/K-3)28 mi away
- PUS · Gimhae International Airport37 mi away
- TAE · Daegu Airport44 mi away
- CHF · Jinhae Airbase/Airport (G-813/K-10)48 mi away
Frequently asked questions
How far is THL from USN?
The flight distance from Tachilek (THL) to Ulsan (USN) is 2,063 miles (3,321 km, 1,793 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from THL to USN?
A nonstop flight takes about 4h 31m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from THL to USN?
Nonstop service on THL–USN depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 4h 31m nonstop estimate.
What is the time difference between Tachilek and Ulsan?
Ulsan is 2.5 hours ahead of Tachilek.
What is the cheapest way to fly from THL to USN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on THL–USN that never appear on search engines, with no booking fees.
Why are some THL to USN fares phone-only?
Consolidator contracts let us sell certain THL–USN tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.