$599 Cheap United flights Seattle (SEA) to Porto (OPO)

$599 Cheap United flights Seattle (SEA) to Porto (OPO)

Prices were available within the past 7 days and start at $599 for one-way flights and $1,167 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Apr 5 - Wed, Apr 8

SEA

Seattle

OPO

Porto

$1,167 Roundtrip, found 1 day ago

$1,167

Roundtrip

found 1 day ago

Select United flight, departing Sun, Apr 5 from Seattle to Porto, returning Wed, Apr 8, priced at $1,167 found 1 day ago

Sun, Apr 5 - Wed, Apr 8

SEA

Seattle

OPO

Porto

$1,178 Roundtrip, found 1 day ago

$1,178

Roundtrip

found 1 day ago

Select United flight, departing Sun, Apr 5 from Seattle to Porto, returning Wed, Apr 8, priced at $1,178 found 1 day ago

Sun, Apr 5 - Wed, Apr 8

SEA

Seattle

OPO

Porto

$1,267 Roundtrip, found 1 day ago

$1,267

Roundtrip

found 1 day ago

Select United flight, departing Sun, Apr 5 from Seattle to Porto, returning Wed, Apr 8, priced at $1,267 found 1 day ago

Sun, Apr 5 - Wed, Apr 8

SEA

Seattle

OPO

Porto

$1,278 Roundtrip, found 1 day ago

$1,278

Roundtrip

found 1 day ago

Select United flight, departing Sun, Apr 5 from Seattle to Porto, returning Wed, Apr 8, priced at $1,278 found 1 day ago

Sun, Apr 5 - Wed, Apr 8

SEA

Seattle

OPO

Porto

$1,283 Roundtrip, found 1 day ago

$1,283

Roundtrip

found 1 day ago

Select United flight, departing Sun, Apr 5 from Seattle to Porto, returning Wed, Apr 8, priced at $1,283 found 1 day ago

Sun, Apr 5 - Wed, Apr 8

SEA

Seattle

OPO

Porto

$1,383 Roundtrip, found 1 day ago

$1,383

Roundtrip

found 1 day ago

Select United flight, departing Sun, Apr 5 from Seattle to Porto, returning Wed, Apr 8, priced at $1,383 found 1 day ago