Flights from Seattle to Cascais

Cheapest flights from Seattle

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Sep 18 - Tue, Sep 30

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$722 Roundtrip, found 1 day ago

$722

Roundtrip

found 1 day ago

Select Turkish Airlines flight, departing Thu, Sep 18 from Seattle - Tacoma Intl. to Humberto Delgado, returning Tue, Sep 30, priced at $722 found 1 day ago

Sun, Sep 21 - Tue, Sep 30

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$742 Roundtrip, found 1 day ago

$742

Roundtrip

found 1 day ago

Select Turkish Airlines flight, departing Sun, Sep 21 from Seattle - Tacoma Intl. to Humberto Delgado, returning Tue, Sep 30, priced at $742 found 1 day ago

Mon, Sep 22 - Fri, Oct 3

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$744 Roundtrip, found 1 day ago

$744

Roundtrip

found 1 day ago

Select Air Canada flight, departing Mon, Sep 22 from Seattle - Tacoma Intl. to Humberto Delgado, returning Fri, Oct 3, priced at $744 found 1 day ago

Sun, Sep 21 - Fri, Oct 3

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$749 Roundtrip, found 1 day ago

$749

Roundtrip

found 1 day ago

Select United flight, departing Sun, Sep 21 from Seattle - Tacoma Intl. to Humberto Delgado, returning Fri, Oct 3, priced at $749 found 1 day ago

Wed, Sep 17 - Fri, Oct 3

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$751 Roundtrip, found 1 day ago

$751

Roundtrip

found 1 day ago

Select Air Canada flight, departing Wed, Sep 17 from Seattle - Tacoma Intl. to Humberto Delgado, returning Fri, Oct 3, priced at $751 found 1 day ago

Thu, Sep 18 - Mon, Sep 29

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$762 Roundtrip, found 1 day ago

$762

Roundtrip

found 1 day ago

Select Turkish Airlines flight, departing Thu, Sep 18 from Seattle - Tacoma Intl. to Humberto Delgado, returning Mon, Sep 29, priced at $762 found 1 day ago

Sat, Sep 20 - Fri, Oct 3

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$763 Roundtrip, found 1 day ago

$763

Roundtrip

found 1 day ago

Select United flight, departing Sat, Sep 20 from Seattle - Tacoma Intl. to Humberto Delgado, returning Fri, Oct 3, priced at $763 found 1 day ago

Thu, Sep 18 - Fri, Oct 3

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$772 Roundtrip, found 1 day ago

$772

Roundtrip

found 1 day ago

Select Turkish Airlines flight, departing Thu, Sep 18 from Seattle - Tacoma Intl. to Humberto Delgado, returning Fri, Oct 3, priced at $772 found 1 day ago

Thu, Sep 18 - Sat, Sep 27

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$782 Roundtrip, found 1 day ago

$782

Roundtrip

found 1 day ago

Select Turkish Airlines flight, departing Thu, Sep 18 from Seattle - Tacoma Intl. to Humberto Delgado, returning Sat, Sep 27, priced at $782 found 1 day ago

Sat, Sep 20 - Mon, Sep 29

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$802 Roundtrip, found 1 day ago

$802

Roundtrip

found 1 day ago

Select Turkish Airlines flight, departing Sat, Sep 20 from Seattle - Tacoma Intl. to Humberto Delgado, returning Mon, Sep 29, priced at $802 found 1 day ago

Fri, Sep 19 - Fri, Oct 3

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$812 Roundtrip, found 1 day ago

$812

Roundtrip

found 1 day ago

Select Turkish Airlines flight, departing Fri, Sep 19 from Seattle - Tacoma Intl. to Humberto Delgado, returning Fri, Oct 3, priced at $812 found 1 day ago

Sat, Sep 20 - Sat, Sep 27

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$822 Roundtrip, found 1 day ago

$822

Roundtrip

found 1 day ago

Select Turkish Airlines flight, departing Sat, Sep 20 from Seattle - Tacoma Intl. to Humberto Delgado, returning Sat, Sep 27, priced at $822 found 1 day ago

Tue, Sep 23 - Sun, Sep 28

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$831 Roundtrip, found 1 day ago

$831

Roundtrip

found 1 day ago

Select United flight, departing Tue, Sep 23 from Seattle - Tacoma Intl. to Humberto Delgado, returning Sun, Sep 28, priced at $831 found 1 day ago

Sun, Sep 21 - Sun, Sep 28

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$841 Roundtrip, found 1 day ago

$841

Roundtrip

found 1 day ago

Select Delta flight, departing Sun, Sep 21 from Seattle - Tacoma Intl. to Humberto Delgado, returning Sun, Sep 28, priced at $841 found 1 day ago

Thu, Sep 18 - Sun, Sep 28

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$901 Roundtrip, found 1 day ago

$901

Roundtrip

found 1 day ago

Select Delta flight, departing Thu, Sep 18 from Seattle - Tacoma Intl. to Humberto Delgado, returning Sun, Sep 28, priced at $901 found 1 day ago

Sat, Sep 20 - Sun, Sep 28

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$910 Roundtrip, found 1 day ago

$910

Roundtrip

found 1 day ago

Select Lufthansa flight, departing Sat, Sep 20 from Seattle - Tacoma Intl. to Humberto Delgado, returning Sun, Sep 28, priced at $910 found 1 day ago

Tue, Sep 23 - Sat, Sep 27

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$931 Roundtrip, found 1 day ago

$931

Roundtrip

found 1 day ago

Select Turkish Airlines flight, departing Tue, Sep 23 from Seattle - Tacoma Intl. to Humberto Delgado, returning Sat, Sep 27, priced at $931 found 1 day ago

Sun, Sep 21 - Sat, Sep 27

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$951 Roundtrip, found 1 day ago

$951

Roundtrip

found 1 day ago

Select Turkish Airlines flight, departing Sun, Sep 21 from Seattle - Tacoma Intl. to Humberto Delgado, returning Sat, Sep 27, priced at $951 found 1 day ago

Fri, Sep 19 - Sun, Sep 28

SEA

Seattle - Tacoma Intl.

LIS

Humberto Delgado

$1,034 Roundtrip, found 1 day ago

$1,034

Roundtrip

found 1 day ago

Select Lufthansa flight, departing Fri, Sep 19 from Seattle - Tacoma Intl. to Humberto Delgado, returning Sun, Sep 28, priced at $1,034 found 1 day ago