Cheapest return flights from Philadelphia to Lisbon in August from $547

Best time to book flights for Philadelphia (PHL) to Lisbon (LIS) flights at AirHint

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

Return flights

20 Aug - 29 Aug Finnair
20 Aug - 29 Aug Iberia direct
21 Aug - 29 Aug Finnair
21 Aug - 29 Aug British Airways direct
12 Aug - 19 Aug United
17 Aug - 24 Aug United
07 Aug - 16 Aug Aer Lingus
09 Aug - 16 Aug Aer Lingus
06 Aug - 10 Aug Finnair direct
27 Aug - 03 Sep United
22 Aug - 29 Aug United

Also check the deals for one-way flights from Philadelphia 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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