Cheapest return flights from Philadelphia to Lisbon in December from $1088

AirHint found the following cheapest return flights from Philadelphia (PHL) to Lisbon (LIS) in December 2025 (see full year).

Return flights

26 Dec - 09 Jan Frontier Airlines
22 Dec - 29 Dec Frontier Airlines
24 Dec - 04 Jan Spirit Airlines
18 Dec - 25 Dec Spirit Airlines
29 Dec - 01 Jan Frontier Airlines
29 Dec - 02 Jan Frontier Airlines
18 Dec - 25 Dec American Airlines direct
27 Dec - 03 Jan Lufthansa
23 Dec - 03 Jan Frontier Airlines
30 Dec - 05 Jan Air Canada
22 Dec - 29 Dec British Airways direct
29 Dec - 02 Jan Iberia direct
29 Dec - 01 Jan Finnair direct
27 Dec - 03 Jan American Airlines direct

Also check the deals for one-way flights from Philadelphia to Lisbon in December.

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