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

Sunday, November 29th, 2026

9 round-trip options

Returning
Fri, Dec 4, 20265 Day Trip
$825 USD
Returning
Sat, Dec 5, 20266 Day Trip
$795 USD
Returning
Sun, Dec 6, 20267 Day Trip
$796 USD
Returning
Mon, Dec 7, 20268 Day Trip
$766 USD
Returning
Wed, Dec 9, 202610 Day Trip
$746 USD
Returning
Thu, Dec 10, 202611 Day Trip
$746 USD
Returning
Fri, Dec 11, 202612 Day Trip
$786 USD
Returning
Sat, Dec 12, 202613 Day Trip
$836 USD
Returning
Sun, Dec 13, 202614 Day Trip
$836 USD