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TSF to BFI: distance & flight time
Treviso (Treviso-Sant'Angelo Airport) → Seattle (Boeing Field King County International Airport)
5,435 mi
8,747 km · 4,723 nm
11h 7m
estimated nonstop flight time
-9h
time difference · heading northwest
See live TSF→BFI fares Phone-only fares on this route — call free
Flight time details
5,435 miles nonstop takes roughly 11h 7m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time set-back when reading arrival times on your ticket.
The two airports
- TSF — Treviso-Sant'Angelo Airport · Treviso, Italy
- 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 TSF
- VCE · Venice Marco Polo Airport12 mi away
- QPA · Padova Airport24 mi away
- AVB · Aviano Air Base33 mi away
- VIC · Vicenza Airport33 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 TSF from BFI?
The flight distance from Treviso (TSF) to Seattle (BFI) is 5,435 miles (8,747 km, 4,723 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TSF 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 time difference between Treviso and Seattle?
Seattle is 9 hours behind Treviso.
What is the cheapest way to fly from TSF to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TSF–BFI that never appear on search engines, with no booking fees.