Cheapest return flights from Washington to Lisbon in August from $584

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

26 Aug - 23 Sep Aer Lingus
03 Aug - 18 Aug Iberia
11 Aug - 18 Aug British Airways
15 Aug - 19 Aug Aer Lingus
11 Aug - 17 Aug Icelandair
05 Aug - 14 Aug Aer Lingus
04 Aug - 14 Aug Aer Lingus
08 Aug - 25 Aug British Airways
15 Aug - 31 Aug Aer Lingus
08 Aug - 16 Aug Icelandair
31 Aug - 08 Sep Turkish Airlines
07 Aug - 15 Aug Icelandair
26 Aug - 02 Sep TAP direct
26 Aug - 23 Sep TAP direct
31 Aug - 07 Sep TAP direct
31 Aug - 08 Sep jetBlue direct

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

Skyscanner

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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