AirHint found the following cheapest return flights from Philadelphia (PHL) to Madrid (MAD) in May 2026 (see full year).

Return flights

01 May - 14 May	TAP
01 May - 14 May	Iberia	direct
03 May - 10 May	Iberia	direct
08 May - 15 May	Iberia	direct
18 May - 25 May	Iberia	direct
13 May - 20 May	Iberia	direct
01 May - 10 May	American Airlines	direct
25 May - 03 Jun	Finnair	direct
11 May - 22 Jun	Finnair
28 May - 04 Jun	Iberia	direct
11 May - 22 Jun	Iberia	direct
23 May - 30 May	Iberia	direct

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

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 May from $611

Return flights