Cheapest return flights from Philadelphia to Lisbon in August from $995

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

25 Aug - 01 Sep Air Canada
18 Aug - 25 Aug United
24 Aug - 06 Sep Air Canada
23 Aug - 30 Aug Air Canada
22 Aug - 30 Aug Air Canada
22 Aug - 31 Aug Air Canada
24 Aug - 06 Sep Finnair direct
25 Aug - 01 Sep Finnair direct
22 Aug - 31 Aug Finnair direct
23 Aug - 30 Aug Finnair direct
22 Aug - 30 Aug Finnair direct

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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