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

10 dates in December, from $ 419. Book in one tap, or check whether to buy now or wait.

One-way Return

Dates, airline, and price
Dates	Airline	Price
29 Dec	Aer Lingus
1 Dec	Air Canada
21 Dec	jetBlue

20 Dec	jetBlue
1 Dec	American Airlines Direct Flight
9 Dec	United
22 Dec	Frontier Airlines
20 Dec	British Airways Direct Flight
21 Dec	American Airlines Direct Flight
22 Dec	American Airlines Direct Flight

Cheapest deals for the full year

Deals for return flights from Philadelphia to Lisbon in December.

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Updated Oct 13, 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), December

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