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Cheap flights from Seattle (BFI) to Porto (OPO)

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0 Children (2~11)
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How to find the cheapest flight from Seattle (BFI) to Porto (OPO)

How to find the cheapest flight from Seattle (BFI) to Porto (OPO)
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How to find the cheapest flight from Seattle (BFI) to Porto (OPO)
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How to find the cheapest flight from Seattle (BFI) to Porto (OPO)
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Cheap flights from Seattle to Porto in May , June 2026

29 May - 19 Jun $ 1,317.00
BFI
Seattle
Air Excursions
3 STOPS
OPO
Porto
OPO
Porto
Air Excursions
3 STOPS
BFI
Seattle
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28 May - 19 Jun $ 1,373.00
BFI
Seattle
Air Excursions
3 STOPS
OPO
Porto
OPO
Porto
Air Excursions
3 STOPS
BFI
Seattle
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28 May - 17 Jun $ 1,436.00
BFI
Seattle
Air Excursions
3 STOPS
OPO
Porto
OPO
Porto
Air Excursions
3 STOPS
BFI
Seattle
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Last minute flights from Seattle to Porto

29 May - 01 Jun $ 1,754.00
BFI
Seattle
Air Excursions
3 STOPS
OPO
Porto
OPO
Porto
Air Excursions
3 STOPS
BFI
Seattle
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28 May - 01 Jun $ 1,818.00
BFI
Seattle
Air Excursions
3 STOPS
OPO
Porto
OPO
Porto
Air Excursions
3 STOPS
BFI
Seattle
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28 May - 01 Jun $ 1,863.00
BFI
Seattle
Air Excursions
3 STOPS
OPO
Porto
OPO
Porto
Air Excursions
3 STOPS
BFI
Seattle
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One-way flights to Porto from Seattle

2:45 PM - 7:00 AM
Norwegian Air Sweden
3 Stops
34h 45m
BFI - OPO
$ 639
Kiwi
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8:05 AM - 4:40 PM
Norwegian Air Sweden
3 Stops
27h 5m
BFI - OPO
$ 682
Kiwi
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8:05 AM - 3:05 PM
Norwegian Air Shuttle
3 Stops
25h 45m
BFI - OPO
$ 722
Kiwi
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How to find the cheapest flight from Seattle (BFI) to Porto (OPO)

Related info for your journey
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How to find the cheapest flight from Seattle (BFI) to Porto (OPO)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Seattle (BFI) to Porto (OPO)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.