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TRS to BFI: distance & flight time
Ronchi De Legionari (Trieste–Friuli Venezia Giulia Airport) → Seattle (Boeing Field King County International Airport)
5,454 mi
8,777 km · 4,739 nm
11h 10m
estimated nonstop flight time
-9h
time difference · heading northwest
See live TRS→BFI fares Phone-only fares on this route — call free
Flight time details
5,454 miles nonstop takes roughly 11h 10m 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
- TRS — Trieste–Friuli Venezia Giulia Airport · Ronchi De Legionari, 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 TRS
- POW · Portoroz Airport25 mi away
- AVB · Aviano Air Base44 mi away
- LJU · Ljubljana Jože Pučnik Airport55 mi away
- VCE · Venice Marco Polo Airport58 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 TRS from BFI?
The flight distance from Ronchi De Legionari (TRS) to Seattle (BFI) is 5,454 miles (8,777 km, 4,739 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from TRS to BFI?
A nonstop flight takes about 11h 10m 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 Ronchi De Legionari and Seattle?
Seattle is 9 hours behind Ronchi De Legionari.
What is the cheapest way to fly from TRS to BFI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on TRS–BFI that never appear on search engines, with no booking fees.