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

Return flights

15 Oct - 22 Oct	Iberia	direct
05 Oct - 12 Oct	Iberia	direct
30 Oct - 06 Nov	Iberia	direct
10 Oct - 17 Oct	Iberia	direct
25 Oct - 01 Nov	Iberia	direct
13 Oct - 18 Oct	British Airways	direct
11 Oct - 13 Oct	Aer Lingus
11 Oct - 13 Oct	Iberia	direct
03 Oct - 05 Oct	United

Also check the deals for one-way 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 return flights from Philadelphia to Madrid in October from 443€

Return flights