Need help booking?
Unpublished phone-only deals available
SEA to THL: distance & flight time
Seattle (Seattle Tacoma International Airport) → Tachilek (Tachileik Airport)
7,061 mi
11,363 km · 6,136 nm
14h 19m
estimated nonstop flight time
+13.5h
time difference · heading northwest
See live SEA→THL fares Phone-only fares on this route — call free
Flight time details
7,061 miles nonstop takes roughly 14h 19m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 13.5-hour time gain when reading arrival times on your ticket.
The two airports
- SEA — Seattle Tacoma International Airport · Seattle, United States
- THL — Tachileik Airport · Tachilek, Burma
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 SEA
- RNT · Renton Municipal Airport5 mi away
- BFI · Boeing Field King County International Airport6 mi away
- TIW · Tacoma Narrows Airport18 mi away
- PWT · Bremerton National Airport21 mi away
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
Frequently asked questions
How far is SEA from THL?
The flight distance from Seattle (SEA) to Tachilek (THL) is 7,061 miles (11,363 km, 6,136 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SEA to THL?
A nonstop flight takes about 14h 19m 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 Seattle and Tachilek?
Tachilek is 13.5 hours ahead of Seattle.
What is the cheapest way to fly from SEA to THL?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SEA–THL that never appear on search engines, with no booking fees.