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

One-Way flights

24 Oct	Spirit Airlines
04 Oct	Spirit Airlines
06 Oct	Frontier Airlines
08 Oct	Frontier Airlines
23 Oct	Frontier Airlines
21 Oct	American Airlines	direct
20 Oct	American Airlines	direct
06 Oct	British Airways	direct
19 Oct	American Airlines	direct
08 Oct	British Airways	direct

Also check the deals for return flights from Philadelphia to Madrid in October.

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 one-way flights from Philadelphia to Madrid in October from $238

One-Way flights