Cheapest return flights from Philadelphia to Lisbon in August from 705€

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

Return flights

30 Aug - 03 Sep Frontier Airlines
27 Aug - 06 Sep Spirit Airlines
19 Aug - 26 Aug TAP
25 Aug - 01 Sep Frontier Airlines
20 Aug - 13 Sep Frontier Airlines
28 Aug - 31 Aug Frontier Airlines
19 Aug - 26 Aug British Airways direct
28 Aug - 20 Sep TAP
20 Aug - 13 Sep Iberia direct
28 Aug - 20 Sep British Airways direct

Also check the deals for one-way flights from Philadelphia 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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