Cheapest return flights from Philadelphia to Lisbon in December from $706

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

Return flights

04 Dec - 07 Dec TAP
24 Dec - 17 Jan British Airways
07 Dec - 27 Dec Iberia direct
25 Dec - 17 Jan British Airways
17 Dec - 10 Jan Spirit Airlines
04 Dec - 07 Dec Iberia direct
26 Dec - 09 Jan Frontier Airlines
20 Dec - 10 Jan Frontier Airlines
08 Dec - 03 Jan Spirit Airlines
24 Dec - 17 Jan Iberia direct
13 Dec - 03 Jan Frontier Airlines
17 Dec - 10 Jan Iberia direct
25 Dec - 02 Jan Air Canada

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

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