$464 Cheap United flights Seattle (SEA) to Porto (OPO)

$464 Cheap United flights Seattle (SEA) to Porto (OPO)

Prices were available within the past 7 days and start at $464 for one-way flights and $586 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Feb 11 - Mon, Feb 23

SEA

Seattle

OPO

Porto

$586 Roundtrip, found 1 day ago

$586

Roundtrip

found 1 day ago

Select United flight, departing Wed, Feb 11 from Seattle to Porto, returning Mon, Feb 23, priced at $586 found 1 day ago

Wed, Feb 11 - Mon, Feb 23

SEA

Seattle

OPO

Porto

$620 Roundtrip, found 1 day ago

$620

Roundtrip

found 1 day ago

Select United flight, departing Wed, Feb 11 from Seattle to Porto, returning Mon, Feb 23, priced at $620 found 1 day ago

Wed, Feb 11 - Mon, Feb 23

SEA

Seattle

OPO

Porto

$622 Roundtrip, found 1 day ago

$622

Roundtrip

found 1 day ago

Select United flight, departing Wed, Feb 11 from Seattle to Porto, returning Mon, Feb 23, priced at $622 found 1 day ago

Wed, Feb 11 - Mon, Feb 23

SEA

Seattle

OPO

Porto

$626 Roundtrip, found 1 day ago

$626

Roundtrip

found 1 day ago

Select United flight, departing Wed, Feb 11 from Seattle to Porto, returning Mon, Feb 23, priced at $626 found 1 day ago

Wed, Feb 11 - Mon, Feb 23

SEA

Seattle

OPO

Porto

$635 Roundtrip, found 1 day ago

$635

Roundtrip

found 1 day ago

Select United flight, departing Wed, Feb 11 from Seattle to Porto, returning Mon, Feb 23, priced at $635 found 1 day ago

Wed, Feb 11 - Mon, Feb 23

SEA

Seattle

OPO

Porto

$637 Roundtrip, found 1 day ago

$637

Roundtrip

found 1 day ago

Select United flight, departing Wed, Feb 11 from Seattle to Porto, returning Mon, Feb 23, priced at $637 found 1 day ago