Lisbon (LIS) to Washington (IAD) cheap flight deal from $3603 USD in first class – flightdeals.net

This site is under active development. Please reach out with any issues or feedback.

flightdeals.net

About Premium Fare Deals

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

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

Wednesday, March 25th, 2026

1 round-trip options

Returning

Sun, Apr 5, 2026•11 Day Trip

$10,434 USD