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CYI to SEA: distance & flight time
Chiayi (Chiayi Airport) → Seattle (Seattle Tacoma International Airport)
6,184 mi
9,951 km · 5,373 nm
12h 35m
estimated nonstop flight time
-15h
time difference · heading northeast
See live CYI→SEA fares Phone-only fares on this route — call free
Flight time details
6,184 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
- SEA — Seattle Tacoma 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 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
Frequently asked questions
How far is CYI from SEA?
The flight distance from Chiayi (CYI) to Seattle (SEA) is 6,184 miles (9,951 km, 5,373 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CYI to SEA?
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 SEA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CYI–SEA that never appear on search engines, with no booking fees.