Lisbon (LIS) to Washington (IAD) cheap flight deal from $3603 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

$7,743 USD

-53%$3,603 USD

Verified 1 day ago

March 2026

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23 24 25 26 27 28 1 2 3 4$3,611 5$3,611 6$3,611 7 8 9$3,611 10 11 12 13 14 15 16 17$3,611 18 19$3,669 20$4,417 21 22 23 24 25$10,434 26 27 28 29 30$14,922 31 1 2 3 4 5

Good Availability

46% of dates checked are available within 10% of the lowest price

Monday, March 30th, 2026

1 round-trip options

Returning

Sun, Apr 5, 2026•6 Day Trip

$14,922 USD