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

Wednesday, August 5th, 2026

7 round-trip options

Returning
Mon, Aug 10, 20265 Day Trip
$958 USD
Returning
Tue, Aug 11, 20266 Day Trip
$977 USD
Returning
Thu, Aug 13, 20268 Day Trip
$977 USD
Returning
Sat, Aug 15, 202610 Day Trip
$1,048 USD
Returning
Sun, Aug 16, 202611 Day Trip
$1,110 USD
Returning
Mon, Aug 17, 202612 Day Trip
$958 USD
Returning
Tue, Aug 18, 202613 Day Trip
$977 USD