Cheapest return flights from Philadelphia to Lisbon in December from $583

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

Return flights

13 Dec - 23 Dec American Airlines
13 Dec - 23 Dec Iberia direct
01 Dec - 27 Dec Finnair
03 Dec - 27 Dec Finnair
01 Dec - 27 Dec British Airways direct
03 Dec - 27 Dec Iberia direct
25 Dec - 01 Jan TAP
30 Dec - 04 Jan British Airways
25 Dec - 02 Jan Air Canada
30 Dec - 04 Jan British Airways direct
28 Dec - 03 Jan British Airways
25 Dec - 01 Jan American Airlines direct

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

Skyscanner

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.

Book a cheap hotel in Lisbon

Cheap car rent in Lisbon

Feel free to contact us with any feedback or request another flight research.