Seattle / Tacoma (SEA) to Lisbon (LIS) flight deal in economy from $740

Air CanadaACAir CanadaLufthansaLHLufthansaSwiss International Air LinesLXSwiss International Air LinesAustrian AirlinesOSAustrian AirlinesUnited AirlinesUAUnited Airlines
Round Trip•Economy
United StatesSEA

Seattle–Tacoma International Airport

Seattle / Tacoma, United States
PortugalLIS

Portela Airport

Lisbon, Portugal
$948 USD
-22%$740 USD
Verified about 11 hours ago
Limited Availability
15% of dates checked are available within 10% of the lowest price

Thursday, August 13th, 2026

7 round-trip options

Returning
Tue, Aug 18, 2026•5 Day Trip
$1,033 USD
Google Flights
Returning
Wed, Aug 19, 2026•6 Day Trip
$1,029 USD
Google Flights
Returning
Fri, Aug 21, 2026•8 Day Trip
$1,032 USD
Google Flights
Returning
Sun, Aug 23, 2026•10 Day Trip
$1,066 USD
Google Flights
Returning
Mon, Aug 24, 2026•11 Day Trip
$1,015 USD
Google Flights
Returning
Tue, Aug 25, 2026•12 Day Trip
$1,032 USD
Google Flights
Returning
Wed, Aug 26, 2026•13 Day Trip
$1,032 USD
Google Flights