Lisbon (LIS) to Washington (IAD) cheap flight deal from $3767 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

$7,334 USD

-49%$3,767 USD

Verified Sep 21, 2025 at 1:30 PM

September 2025

Mon

Tue

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Thu

Fri

Sat

Sun

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21$9,583 22$3,892 23$3,892 24$3,892 25$3,892 26$3,892 27$3,892 28$9,478 29$3,833 30$3,775 1$3,775 2 3$3,775 4$3,869 5$9,478

Good Availability

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

Sunday, September 21st, 2025

4 round-trip options

Returning

Fri, Sep 26, 2025•5 Day Trip

$9,583 USD

Returning

Sat, Sep 27, 2025•6 Day Trip

$9,583 USD

Returning

Sun, Sep 28, 2025•7 Day Trip

$9,583 USD

Returning

Mon, Sep 29, 2025•8 Day Trip

$9,583 USD