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BFI to OPO: distance & flight time
Seattle (Boeing Field King County International Airport) → Porto (Francisco de Sá Carneiro Airport)
5,083 mi
8,180 km · 4,417 nm
10h 26m
estimated nonstop flight time
+8h
time difference · heading northeast
See live BFI→OPO fares Phone-only fares on this route — call free
Flight time details
5,083 miles nonstop takes roughly 10h 26m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time gain when reading arrival times on your ticket.
The two airports
- BFI — Boeing Field King County International Airport · Seattle, United States
- OPO — Francisco de Sá Carneiro Airport · Porto, Portugal
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 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
Near OPO
- BGZ · Braga Municipal Aerodrome26 mi away
- VRL · Vila Real Airport50 mi away
- VSE · Aerodromo Goncalves Lobato (Viseu Airport)55 mi away
- VGO · Vigo Airport68 mi away
Frequently asked questions
How far is BFI from OPO?
The flight distance from Seattle (BFI) to Porto (OPO) is 5,083 miles (8,180 km, 4,417 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BFI to OPO?
A nonstop flight takes about 10h 26m 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 Seattle and Porto?
Porto is 8 hours ahead of Seattle.
What is the cheapest way to fly from BFI to OPO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BFI–OPO that never appear on search engines, with no booking fees.