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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 August , September 2026

28 Aug - 17 Sep $ 1,499.00
BFI
Seattle
Air Excursions
3 STOPS
OPO
Porto
OPO
Porto
Air Excursions
3 STOPS
BFI
Seattle
Pick dates
30 Aug - 17 Sep $ 1,513.00
BFI
Seattle
Air Excursions
3 STOPS
OPO
Porto
OPO
Porto
Air Excursions
3 STOPS
BFI
Seattle
Pick dates
28 Aug - 02 Sep $ 1,572.00
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

28 Aug - 02 Sep $ 1,828.00
BFI
Seattle
Air Excursions
3 STOPS
OPO
Porto
OPO
Porto
Air Excursions
3 STOPS
BFI
Seattle
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28 Aug - 01 Sep $ 1,887.00
BFI
Seattle
Air Excursions
3 STOPS
OPO
Porto
OPO
Porto
Air Excursions
3 STOPS
BFI
Seattle
Pick dates
26 Aug - 01 Sep $ 1,957.00
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

2:35 PM - 7:00 AM
Norwegian Air Sweden
3 Stops
34h 55m
BFI - OPO
$ 745
Kiwi
Pick dates
3:05 PM - 7:10 AM
Norwegian Air Sweden
3 Stops
34h 35m
BFI - OPO
$ 760
Kiwi
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8:05 PM - 3:25 PM
Transavia France
3 Stops
36h 40m
BFI - OPO
$ 779
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.