Cheapest return flights from Washington to Lisbon in August from $762

Best time to book flights for Washington (IAD) to Lisbon (LIS) flights at AirHint

AirHint found the following cheapest return flights from Washington (IAD) to Lisbon (LIS) in August 2025 (see full year).

Return flights

20 Aug - 01 Sep Scandinavian Airlines
21 Aug - 31 Aug Turkish Airlines
29 Aug - 05 Sep Turkish Airlines
22 Aug - 31 Aug Turkish Airlines
30 Aug - 06 Sep Royal Air Maroc
31 Aug - 07 Sep Turkish Airlines
01 Aug - 12 Aug Turkish Airlines
18 Aug - 26 Aug Aer Lingus
08 Aug - 17 Aug Royal Air Maroc
12 Aug - 19 Aug TAP direct
01 Aug - 12 Aug TAP direct
29 Aug - 05 Sep TAP direct
31 Aug - 07 Sep TAP direct
20 Aug - 01 Sep TAP direct
02 Aug - 09 Aug TAP direct
21 Aug - 31 Aug TAP direct
30 Aug - 06 Sep TAP direct
22 Aug - 29 Aug TAP direct

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

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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