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NGS to BFI: distance & flight time
Nagasaki (Nagasaki Airport) → Seattle (Boeing Field King County International Airport)
5,309 mi
8,544 km · 4,613 nm
10h 53m
estimated nonstop flight time
-16h
time difference · heading northeast
See live NGS→BFI fares Phone-only fares on this route — call free
Flight time details
5,309 miles nonstop takes roughly 10h 53m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 16-hour time set-back when reading arrival times on your ticket.
The two airports
- NGS — Nagasaki Airport · Nagasaki, Japan
- 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 NGS
- HSG · Saga Airport28 mi away
- AXJ · Amakusa Airport33 mi away
- KMJ · Kumamoto Airport55 mi away
- FUK · Fukuoka Airport56 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 NGS from BFI?
The flight distance from Nagasaki (NGS) to Seattle (BFI) is 5,309 miles (8,544 km, 4,613 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from NGS to BFI?
A nonstop flight takes about 10h 53m 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 Nagasaki and Seattle?
Seattle is 16 hours behind Nagasaki.
What is the cheapest way to fly from NGS to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on NGS–BFI that never appear on search engines, with no booking fees.