Cheapest return flights from Washington to Lisbon in August from $602

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

Return flights

26 Aug - 09 Sep Turkish Airlines
25 Aug - 01 Sep Turkish Airlines
27 Aug - 03 Sep Turkish Airlines
22 Aug - 29 Aug Scandinavian Airlines
30 Aug - 07 Sep Turkish Airlines
26 Aug - 02 Sep Scandinavian Airlines
26 Aug - 09 Sep TAP direct
24 Aug - 31 Aug Turkish Airlines
19 Aug - 26 Aug TAP direct
24 Aug - 31 Aug TAP direct
25 Aug - 01 Sep TAP direct
26 Aug - 02 Sep TAP direct
22 Aug - 29 Aug TAP direct
30 Aug - 07 Sep TAP direct
19 Aug - 23 Aug Royal Air Maroc
28 Aug - 04 Sep Scandinavian Airlines
04 Aug - 11 Aug Finnair
03 Aug - 10 Aug Iberia
13 Aug - 17 Aug Royal Air Maroc
08 Aug - 15 Aug Royal Air Maroc

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

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