Cheapest one-way flights from Philadelphia to Lisbon in December from $261

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

One-Way flights

07 Dec Frontier Airlines
03 Dec Spirit Airlines
23 Dec Frontier Airlines
24 Dec Spirit Airlines
07 Dec Iberia direct
03 Dec Iberia direct
20 Dec Frontier Airlines
24 Dec Iberia direct
23 Dec British Airways direct
20 Dec Iberia direct

Also check the deals for return flights from Philadelphia to Lisbon in December.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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