Cheapest return flights from Washington to Lisbon in August from $788

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

04 Aug - 16 Aug Finnair
01 Aug - 18 Aug Air France
04 Aug - 16 Aug TAP direct
01 Aug - 16 Aug TAP direct
01 Aug - 18 Aug TAP direct
12 Aug - 19 Aug TAP 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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