Lisbon (LIS) to Washington (IAD) flight deal from $3613 USD in first class – flightdeals.net

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American Airlines

AAAmerican Airlines

British Airways

BABritish Airways

Round Trip•First Class

Portela Airport

Lisbon, Portugal

Washington Dulles International Airport

Washington, United States

$5,843 USD

-38%$3,613 USD

Verified Nov 28, 2025 at 9:26 PM

February 2026

Mon

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26 27 28 29 30 31 1$3,614 2$3,614 3$3,614 4$3,614 5$3,614 6$3,614 7$3,614 8$3,614 9$4,298 10$3,614 11$3,614 12$3,614 13$3,614 14$3,614 15$3,614 16 17 18 19 20 21 22 23$3,649 24$3,649 25$3,614 26$3,614 27$3,614 28$3,614 1$3,614

Great Availability

64% of dates checked are available within 10% of the lowest price

Monday, February 9th, 2026

3 round-trip options

Returning

Sat, Feb 14, 2026•5 Day Trip

$9,602 USD

Returning

Sun, Feb 15, 2026•6 Day Trip

$9,427 USD

Returning

Mon, Feb 23, 2026•14 Day Trip

$4,298 USD