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

Return flights

03 Dec - 10 Dec	Iberia	direct
08 Dec - 15 Dec	Iberia	direct
13 Dec - 27 Jan	American Airlines
12 Dec - 16 Jan	British Airways
12 Dec - 19 Dec	Air Canada
05 Dec - 07 Dec	British Airways	direct
13 Dec - 09 Jan	American Airlines
12 Dec - 09 Jan	Iberia
06 Dec - 10 Jan	Air Canada
06 Dec - 10 Jan	British Airways	direct
24 Dec - 05 Jan	Air Canada
17 Dec - 27 Jan	American Airlines	direct
14 Dec - 09 Jan	TAP
19 Dec - 19 Jan	jetBlue
16 Dec - 21 Dec	Aer Lingus
13 Dec - 20 Dec	Iberia
18 Dec - 25 Dec	Iberia	direct
23 Dec - 30 Dec	Iberia	direct
18 Dec - 29 Dec	Air Canada
21 Dec - 28 Dec	American Airlines	direct

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

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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Cheapest return flights from Philadelphia to Madrid in December from $422

Return flights