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Cheapest return flights from Philadelphia (PHL) to Lisbon (LIS), September

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Dates, airline, and price
Dates	Airline	Price
18 Sep 26 Sep	jetBlue
05 Sep 19 Sep	jetBlue
18 Sep 25 Sep	jetBlue
18 Sep 27 Sep	jetBlue
03 Sep 13 Sep	jetBlue
01 Sep 08 Sep	Aer Lingus
17 Sep 17 Oct	jetBlue
24 Sep 27 Sep	Frontier Airlines
01 Sep 08 Sep	Finnair Direct Flight

deals for one-way flights from Philadelphia to Lisbon in September.

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Updated May 23, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest return flights from Philadelphia (PHL) to Lisbon (LIS), September

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