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CYI to BFI: distance & flight time
Chiayi (Chiayi Airport) → Seattle (Boeing Field King County International Airport)
6,181 mi
9,947 km · 5,371 nm
12h 35m
estimated nonstop flight time
-15h
time difference · heading northeast
See live CYI→BFI fares Phone-only fares on this route — call free
Flight time details
6,181 miles nonstop takes roughly 12h 35m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time set-back when reading arrival times on your ticket.
The two airports
- CYI — Chiayi Airport · Chiayi, Taiwan
- 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 CYI
- TNN · Tainan Airport37 mi away
- MZG · Makung Airport49 mi away
- PIF · Pingtung North Airport53 mi away
- TXG · Taichung Airport53 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 CYI from BFI?
The flight distance from Chiayi (CYI) to Seattle (BFI) is 6,181 miles (9,947 km, 5,371 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CYI to BFI?
A nonstop flight takes about 12h 35m 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 Chiayi and Seattle?
Seattle is 15 hours behind Chiayi.
What is the cheapest way to fly from CYI to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CYI–BFI that never appear on search engines, with no booking fees.