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

Return flights

30 Oct - 06 Nov	Iberia	direct
14 Oct - 08 Nov	Air Canada
05 Oct - 25 Oct	Air Canada
24 Oct - 15 Nov	Iberia	direct
12 Oct - 01 Nov	British Airways	direct
03 Oct - 10 Oct	Lufthansa
12 Oct - 09 Nov	Air Canada
18 Oct - 25 Oct	Air Canada
24 Oct - 31 Oct	Iberia	direct
14 Oct - 08 Nov	British Airways	direct
08 Oct - 01 Nov	Lufthansa
22 Oct - 29 Oct	Iberia	direct
24 Oct - 28 Oct	Frontier Airlines
10 Oct - 19 Oct	Spirit Airlines
05 Oct - 25 Oct	British Airways	direct
20 Oct - 27 Oct	Iberia	direct
10 Oct - 25 Oct	Spirit Airlines

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 404€

Return flights