Cheapest return flights from Philadelphia to Lisbon in August from $573

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

Return flights

11 Aug - 20 Aug Aer Lingus
20 Aug - 28 Aug Spirit Airlines
01 Aug - 29 Aug Spirit Airlines
22 Aug - 31 Aug Aer Lingus
11 Aug - 19 Aug Iberia direct
19 Aug - 28 Aug American Airlines direct
11 Aug - 20 Aug American Airlines direct
10 Aug - 20 Aug American Airlines direct
09 Aug - 19 Aug TAP
27 Aug - 06 Sep TAP
09 Aug - 20 Aug TAP
29 Aug - 01 Sep TAP
14 Aug - 01 Sep American Airlines direct
27 Aug - 03 Sep United
25 Aug - 01 Sep United
30 Aug - 06 Sep United
29 Aug - 01 Sep Finnair 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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