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BFI to THL: distance & flight time
Seattle (Boeing Field King County International Airport) → Tachilek (Tachileik Airport)
7,057 mi
11,357 km · 6,132 nm
14h 18m
estimated nonstop flight time
+13.5h
time difference · heading northwest
See live BFI→THL fares Phone-only fares on this route — call free
Flight time details
7,057 miles nonstop takes roughly 14h 18m 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
- BFI — Boeing Field King County 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 BFI
- SEA · Seattle Tacoma International Airport6 mi away
- RNT · Renton Municipal Airport5 mi away
- PWT · Bremerton National Airport22 mi away
- TIW · Tacoma Narrows Airport22 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 BFI from THL?
The flight distance from Seattle (BFI) to Tachilek (THL) is 7,057 miles (11,357 km, 6,132 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BFI to THL?
A nonstop flight takes about 14h 18m 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 BFI to THL?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BFI–THL that never appear on search engines, with no booking fees.