Cheapest return flights from Philadelphia to Lisbon in August from 583€

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

Return flights

25 Aug - 03 Sep Aer Lingus
17 Aug - 26 Aug British Airways direct
13 Aug - 27 Aug TAP
16 Aug - 25 Aug Spirit Airlines
19 Aug - 24 Aug Spirit Airlines
24 Aug - 30 Aug Frontier Airlines
13 Aug - 21 Aug Spirit Airlines
25 Aug - 03 Sep Finnair direct
27 Aug - 06 Sep TAP
16 Aug - 25 Aug British Airways direct
28 Aug - 07 Sep TAP
14 Aug - 01 Sep Frontier Airlines
22 Aug - 31 Aug Aer Lingus
11 Aug - 19 Aug Frontier Airlines
11 Aug - 18 Aug Spirit Airlines
27 Aug - 03 Sep United
31 Aug - 07 Sep United
25 Aug - 01 Sep United
29 Aug - 05 Sep United
28 Aug - 07 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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