February is by far the best month, wherein you can get cheapest flights for Lisbon to Washington. Meanwhile, February is perceived as the expensive month due to the varying factors. That’s why it’s highly advised to make advanced online flight booking to save huge amounts of money.
Disclaimer - All the mentioned fares were found within last 48 hrs. The displayed fares are based on historical data and are subject to change. The fares cannot be guaranteed at the time of booking.
LIS
22:15
Lisbon Humberto Delgado Airport
Wed , 03 Sep 2025
IAD
15:50
Washington Washington Dulles International Airport
Thu, 04 Sep 2025
LIS
18:40
Lisbon Humberto Delgado Airport
Wed , 03 Sep 2025
IAD
19:05
Washington Washington Dulles International Airport
Thu, 04 Sep 2025
LIS
18:40
Lisbon Humberto Delgado Airport
Mon , 01 Sep 2025
IAD
19:05
Washington Washington Dulles International Airport
Tue, 02 Sep 2025
LIS
17:30
Lisbon Humberto Delgado Airport
Mon , 01 Sep 2025
IAD
20:50
Washington Washington Dulles International Airport
Mon, 01 Sep 2025
LIS
13:15
Lisbon Humberto Delgado Airport
Mon , 01 Sep 2025
IAD
19:05
Washington Washington Dulles International Airport
Mon, 01 Sep 2025
LIS
11:25
Lisbon Humberto Delgado Airport
Mon , 01 Sep 2025
IAD
18:55
Washington Washington Dulles International Airport
Mon, 01 Sep 2025
LIS
16:30
Lisbon Humberto Delgado Airport
Mon , 01 Sep 2025
IAD
11:45
Washington Washington Dulles International Airport
Tue, 02 Sep 2025
LIS
07:15
Lisbon Humberto Delgado Airport
Mon , 01 Sep 2025
IAD
19:59
Washington Washington Dulles International Airport
Mon, 01 Sep 2025
LIS
05:55
Lisbon Humberto Delgado Airport
Mon , 01 Sep 2025
IAD
19:45
Washington Washington Dulles International Airport
Mon, 01 Sep 2025
LIS
20:15
Lisbon Humberto Delgado Airport
Wed , 03 Sep 2025
IAD
14:40
Washington Washington Dulles International Airport
Thu, 04 Sep 2025
LIS
20:25
Lisbon Humberto Delgado Airport
Mon , 01 Sep 2025
IAD
14:40
Washington Washington Dulles International Airport
Tue, 02 Sep 2025