Cheap flights from Seattle to Cascais Coast from CA $461

View CA $461 flight on Wed, Oct. 29, 2025Opens in a new window

Popular airlines from Seattle to Cascais Coast

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  • Air Canada

    Air Canada

  • Delta

    Delta

  • Virgin Atlantic

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  • Aer Lingus

    Aer Lingus

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Cheap flights from Seattle (SEA) to Cascais Coast (LIS)

Prices were available within the past 7 days and start at CA $461 for one-way flights and CA $692 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Sat, Apr. 11 - Thu, Apr. 16
SEA
Seattle
LIS
Lisbon
CA $692 Roundtrip, found 12 hours ago
CA $692
Roundtrip
found 12 hours ago
Select Icelandair flight, departing Sat, Apr. 11 from Seattle to Lisbon, returning Thu, Apr. 16, priced at CA $692 found 12 hours ago
United
Mon, Oct. 27 - Mon, Nov. 10
SEA
Seattle
LIS
Lisbon
CA $719 Roundtrip, found 6 days ago
CA $719
Roundtrip
found 6 days ago
Select United flight, departing Mon, Oct. 27 from Seattle to Lisbon, returning Mon, Nov. 10, priced at CA $719 found 6 days ago
Aer Lingus
Sat, Oct. 25 - Mon, Nov. 3
SEA
Seattle
LIS
Lisbon
CA $729 Roundtrip, found 5 days ago
CA $729
Roundtrip
found 5 days ago
Select Aer Lingus flight, departing Sat, Oct. 25 from Seattle to Lisbon, returning Mon, Nov. 3, priced at CA $729 found 5 days ago
American Airlines
Sat, Mar. 14 - Thu, Mar. 26
SEA
Seattle
LIS
Lisbon
CA $730 Roundtrip, found 9 hours ago
CA $730
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Sat, Mar. 14 from Seattle to Lisbon, returning Thu, Mar. 26, priced at CA $730 found 9 hours ago
Air Canada
Tue, Dec. 2 - Mon, Mar. 16
SEA
Seattle
LIS
Lisbon
CA $731 Roundtrip, found 1 day ago
CA $731
Roundtrip
found 1 day ago
Select Air Canada flight, departing Tue, Dec. 2 from Seattle to Lisbon, returning Mon, Mar. 16, priced at CA $731 found 1 day ago
Delta
Sun, Nov. 2 - Thu, Nov. 13
SEA
Seattle
LIS
Lisbon
CA $747 Roundtrip, found 1 day ago
CA $747
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, Nov. 2 from Seattle to Lisbon, returning Thu, Nov. 13, priced at CA $747 found 1 day ago

Find the cheapest month to fly from Seattle (SEA) to Lisbon (LIS)

February is typically the cheapest month to fly

From CA $647 - CA $1,470 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.