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

Return flights

17 Aug - 26 Aug	Spirit Airlines
19 Aug - 26 Aug	United
19 Aug - 26 Aug	Iberia	direct
17 Aug - 26 Aug	Finnair	direct
16 Aug - 26 Aug	Air Canada
21 Aug - 28 Aug	Iberia	direct
15 Aug - 22 Aug	Iberia	direct
16 Aug - 26 Aug	Finnair	direct
17 Aug - 24 Aug	Iberia	direct
25 Aug - 30 Aug	Frontier Airlines
25 Aug - 01 Sep	United
25 Aug - 01 Sep	Iberia	direct
27 Aug - 03 Sep	United

Also check the deals for one-way flights from Philadelphia to Madrid in August.

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.

Book a cheap hotel in Madrid

Cheap car rent in Madrid

Cheapest return flights from Philadelphia to Madrid in August from 485€

Return flights