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TST to BFI: distance & flight time
Trang (Trang Airport) → Seattle (Boeing Field King County International Airport)
7,855 mi
12,641 km · 6,826 nm
15h 52m
estimated nonstop flight time
-14h
time difference · heading northeast
See live TST→BFI fares Phone-only fares on this route — call free
Flight time details
7,855 miles nonstop takes roughly 15h 52m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time set-back when reading arrival times on your ticket.
The two airports
- TST — Trang Airport · Trang, Thailand
- BFI — Boeing Field King County International Airport · Seattle, United States
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 TST
- KBV · Krabi Airport59 mi away
- HDY · Hat Yai International Airport66 mi away
- SGZ · Songkhla Airport71 mi away
- NST · Nakhon Si Thammarat Airport75 mi away
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
Frequently asked questions
How far is TST from BFI?
The flight distance from Trang (TST) to Seattle (BFI) is 7,855 miles (12,641 km, 6,826 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TST to BFI?
A nonstop flight takes about 15h 52m 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 Trang and Seattle?
Seattle is 14 hours behind Trang.
What is the cheapest way to fly from TST to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TST–BFI that never appear on search engines, with no booking fees.