Seattle / Tacoma (SEA) to Lisbon (LIS) flight deal from $446 USD in economy class

AAAmerican Airlines

AYFinnair

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

LIS

Portela Airport

Lisbon, Portugal

$828 USD

-46%$446 USD

Verified Dec 1, 2025 at 4:08 AM

January 2026

Today

Mon

Tue

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Sun

29$622 30$447 31$447 1$559 2$669 3$849 4$679 5$620 6$572 7$496 8$472 9$471 10$471 11$446 12$446 13$446 14$446 15$471 16$471 17$471 18$446 19$446 20$446 21$446 22$471 23$471 24$471 25$446 26$454 27$446 28$446 29$471 30$471 31$471 1

Limited Availability

19% of dates checked are available within 10% of the lowest price

Sunday, January 4th, 2026

10 round-trip options

Returning

Fri, Jan 9, 2026•5 Day Trip

$1,177 USD

Google Flights

Returning

Sat, Jan 10, 2026•6 Day Trip

$1,011 USD

Google Flights

Returning

Sun, Jan 11, 2026•7 Day Trip

$855 USD

Google Flights

Returning

Mon, Jan 12, 2026•8 Day Trip

$700 USD

Google Flights

Returning

Tue, Jan 13, 2026•9 Day Trip

$698 USD

Google Flights

Returning

Wed, Jan 14, 2026•10 Day Trip

$683 USD

Google Flights

Returning

Thu, Jan 15, 2026•11 Day Trip

$679 USD

Google Flights

Returning

Fri, Jan 16, 2026•12 Day Trip

$698 USD

Google Flights

Returning

Sat, Jan 17, 2026•13 Day Trip

$793 USD

Google Flights

Returning

Sun, Jan 18, 2026•14 Day Trip

$808 USD

Google Flights