Lisbon (LIS) to Seattle / Tacoma (SEA) cheap flight deal from $3737 USD in first class – flightdeals.net

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About Premium Fare Deals

American Airlines

AAAmerican Airlines

British Airways

BABritish Airways

Round Trip•First Class

Portela Airport

Lisbon, Portugal

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

$8,619 USD

-57%$3,737 USD

Verified 1 day ago

March 2026

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Sun

23 24 25 26 27 28 1 2 3 4$5,391 5 6 7 8 9 10 11$4,568 12$5,391 13 14 15 16 17 18$5,391 19 20$3,745 21 22 23$9,435 24$4,568 25$10,250 26 27 28 29 30$15,119 31 1 2 3 4 5

Extremely Rare Availability

3% of dates checked are available within 10% of the lowest price

Monday, March 23rd, 2026

1 round-trip options

Returning

Sun, Apr 5, 2026•13 Day Trip

$9,435 USD