Cheapest one-way flights from Philadelphia to Madrid in September from $280

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

One-Way flights

27 Sep Spirit Airlines
21 Sep Frontier Airlines
20 Sep Spirit Airlines
08 Sep Frontier Airlines
19 Sep Spirit Airlines
12 Sep Spirit Airlines
17 Sep Frontier Airlines
06 Sep Frontier Airlines
21 Sep Finnair direct
02 Sep TAP

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

Skyscanner

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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