Cheapest return PHL–LIS flights, August

AirHint found the following cheapest return flights from Philadelphia (PHL) to Lisbon (LIS) in August 2026 (see full year).

Return flights

25 Aug - 08 Sep Lufthansa
31 Aug - 08 Sep Aer Lingus
31 Aug - 20 Sep Austrian Airlines
22 Aug - 05 Sep Aer Lingus
11 Aug - 19 Aug Finnair direct
31 Aug - 20 Sep British Airways direct
22 Aug - 05 Sep Iberia direct

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

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