Need help booking?
Unpublished phone-only deals available
TNH to BFI: distance & flight time
Tonghua (Tonghua Sanyuanpu Airport) → Seattle (Boeing Field King County International Airport)
4,976 mi
8,007 km · 4,324 nm
10h 13m
estimated nonstop flight time
-15h
time difference · heading northeast
See live TNH→BFI fares Phone-only fares on this route — call free
Flight time details
4,976 miles nonstop takes roughly 10h 13m 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
- TNH — Tonghua Sanyuanpu Airport · Tonghua, 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 TNH
- NBS · Changbaishan Airport98 mi away
- CGQ · Longjia Airport120 mi away
- SHE · Taoxian Airport122 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 TNH from BFI?
The flight distance from Tonghua (TNH) to Seattle (BFI) is 4,976 miles (8,007 km, 4,324 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TNH to BFI?
A nonstop flight takes about 10h 13m 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 Tonghua and Seattle?
Seattle is 15 hours behind Tonghua.
What is the cheapest way to fly from TNH to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TNH–BFI that never appear on search engines, with no booking fees.