Cheapest return flights from Washington to Lisbon in August from $601

AirHint found the following cheapest return flights from Washington (IAD) to Lisbon (LIS) in August 2026 (see full year).

Return flights

26 Aug - 02 Sep Turkish Airlines
21 Aug - 31 Aug Scandinavian Airlines
27 Aug - 02 Sep Turkish Airlines
21 Aug - 30 Aug Scandinavian Airlines
19 Aug - 26 Aug Iberia
17 Aug - 24 Aug Iberia
20 Aug - 27 Aug Scandinavian Airlines
18 Aug - 25 Aug Iberia
20 Aug - 30 Aug Scandinavian Airlines
31 Aug - 07 Sep Turkish Airlines
11 Aug - 20 Aug Iberia
17 Aug - 22 Aug Scandinavian Airlines
10 Aug - 18 Aug Iberia
28 Aug - 06 Sep Scandinavian Airlines
29 Aug - 05 Sep Turkish Airlines
26 Aug - 02 Sep TAP direct
27 Aug - 02 Sep TAP direct
30 Aug - 06 Sep Air France
30 Aug - 06 Sep TAP direct
31 Aug - 07 Sep TAP direct

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

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