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IAG to BFI: distance & flight time
Niagara Falls (Niagara Falls International Airport) → Seattle (Boeing Field King County International Airport)
2,101 mi
3,381 km · 1,825 nm
4h 35m
estimated nonstop flight time
-3h
time difference · heading northwest
See live IAG→BFI fares Phone-only fares on this route — call free
Flight time details
2,101 miles nonstop takes roughly 4h 35m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time set-back when reading arrival times on your ticket.
The two airports
- IAG — Niagara Falls International Airport · Niagara Falls, United States
- 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 IAG
- YYZ · Lester B. Pearson International Airport52 mi away
- YCM · Niagara District Airport13 mi away
- BUF · Buffalo Niagara International Airport16 mi away
- DU9 · Dunnville Airport37 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 IAG from BFI?
The flight distance from Niagara Falls (IAG) to Seattle (BFI) is 2,101 miles (3,381 km, 1,825 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAG to BFI?
A nonstop flight takes about 4h 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 Niagara Falls and Seattle?
Seattle is 3 hours behind Niagara Falls.
What is the cheapest way to fly from IAG to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAG–BFI that never appear on search engines, with no booking fees.