Cheapest one-way flights from Philadelphia to Madrid in December from $534

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

One-Way flights

28 Dec Frontier Airlines
20 Dec Frontier Airlines
25 Dec Spirit Airlines
27 Dec Frontier Airlines
24 Dec Spirit Airlines
23 Dec Frontier Airlines
26 Dec Air Canada
17 Dec Aer Lingus
18 Dec Frontier Airlines
28 Dec British Airways direct

Also check the deals for return flights from Philadelphia to Madrid 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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