Cheapest return flights from Washington (IAD) to Lisbon (LIS), August

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
30 Aug 05 Sep TAP
Direct Flight
25 Aug 10 Sep TAP
Direct Flight
24 Aug 31 Aug TAP
Direct Flight
19 Aug 27 Aug TAP
Direct Flight
30 Aug 08 Sep TAP
Direct Flight
30 Aug 09 Sep TAP
Direct Flight
31 Aug 05 Sep TAP
Direct Flight
26 Aug 15 Sep TAP
Direct Flight
15 Aug 24 Aug TAP
Direct Flight
27 Aug 03 Sep TAP
Direct Flight
19 Aug 31 Aug TAP
Direct Flight
24 Aug 15 Sep TAP
Direct Flight
28 Aug 11 Sep Icelandair
18 Aug 26 Aug Frontier Airlines
30 Aug 07 Sep Icelandair
24 Aug 30 Aug TAP
Direct Flight
05 Aug 20 Aug Frontier Airlines
25 Aug 30 Aug TAP
Direct Flight
21 Aug 29 Aug Aer Lingus
14 Aug 21 Aug Breeze Airways
Powered by

deals for one-way flights from Washington to Lisbon in August.

Book a cheap hotel in Lisbon

Cheap car rent in Lisboa

Updated Jul 13, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

Feel free to contact us with any feedback or request another flight research.