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UCB to BFI: distance & flight time
Wulanchabu (Ulanqab Jining Airport) → Seattle (Boeing Field King County International Airport)
5,436 mi
8,748 km · 4,723 nm
11h 7m
estimated nonstop flight time
—
time difference · heading northeast
See live UCB→BFI fares Phone-only fares on this route — call free
Flight time details
5,436 miles nonstop takes roughly 11h 7m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- UCB — Ulanqab Jining Airport · Wulanchabu, China
- 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 UCB
- HET · Baita International Airport70 mi away
- DAT · Datong Airport76 mi away
- ZQZ · Zhangjiakou Ningyuan Airport99 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 UCB from BFI?
The flight distance from Wulanchabu (UCB) to Seattle (BFI) is 5,436 miles (8,748 km, 4,723 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from UCB to BFI?
A nonstop flight takes about 11h 7m 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 cheapest way to fly from UCB to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on UCB–BFI that never appear on search engines, with no booking fees.