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

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
13 Sep 24 Sep Frontier Airlines
08 Sep 30 Sep Frontier Airlines
01 Sep 08 Sep jetBlue
02 Sep 09 Sep jetBlue
30 Sep 10 Oct Frontier Airlines
05 Sep 13 Sep jetBlue
16 Sep 23 Sep Frontier Airlines
09 Sep 16 Sep Frontier Airlines
19 Sep 26 Sep Frontier Airlines
25 Sep 03 Oct jetBlue
23 Sep 03 Oct Frontier Airlines
17 Sep 20 Sep Frontier Airlines
17 Sep 20 Sep Finnair
Direct Flight
25 Sep 03 Oct Iberia
Direct Flight
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deals for one-way flights from Philadelphia to Lisbon in September.

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Updated Jul 22, 2026.

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