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Cheapest one-way flights from Philadelphia (PHL) to Lisbon (LIS), September

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Dates, airline, and price
Dates	Airline	Price
21 Sep	Aer Lingus
21 Sep	Iberia Direct Flight
19 Sep	British Airways
18 Sep	British Airways
19 Sep	British Airways Direct Flight
18 Sep	British Airways Direct Flight
03 Sep	TAP
03 Sep	Iberia Direct Flight

deals for return 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 one-way flights from Philadelphia (PHL) to Lisbon (LIS), September

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