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BFI to TNN: distance & flight time
Seattle (Boeing Field King County International Airport) → Tainan (Tainan Airport)
6,216 mi
10,004 km · 5,402 nm
12h 39m
estimated nonstop flight time
+15h
time difference · heading northwest
See live BFI→TNN fares Phone-only fares on this route — call free
Flight time details
6,216 miles nonstop takes roughly 12h 39m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time gain when reading arrival times on your ticket.
The two airports
- BFI — Boeing Field King County International Airport · Seattle, United States
- TNN — Tainan Airport · Tainan, Taiwan
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 TNN
- PIF · Pingtung North Airport25 mi away
- KHH · Kaohsiung International Airport27 mi away
- CYI · Chiayi Airport37 mi away
- WOT · Wang-an Airport53 mi away
Frequently asked questions
How far is BFI from TNN?
The flight distance from Seattle (BFI) to Tainan (TNN) is 6,216 miles (10,004 km, 5,402 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BFI to TNN?
A nonstop flight takes about 12h 39m 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 Tainan?
Tainan is 15 hours ahead of Seattle.
What is the cheapest way to fly from BFI to TNN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BFI–TNN that never appear on search engines, with no booking fees.