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	Delta
10 May - 18 May	Air France
01 May - 10 May	Delta
01 May - 09 May	TAP
12 May - 09 Jun	British Airways
12 May - 09 Jun	Iberia	direct
12 May - 29 May	Iberia	direct
08 May - 17 May	Air Canada
15 May - 09 Jun	Air Canada
16 May - 09 Jun	Air Canada
09 May - 16 May	Iberia
14 May - 09 Jun	Finnair	direct
16 May - 09 Jun	Iberia	direct
14 May - 21 May	Iberia	direct
11 May - 30 May	Lufthansa
08 May - 17 May	Iberia	direct
19 May - 09 Jun	Iberia	direct
15 May - 08 Jun	Air Canada
16 May - 08 Jun	Air Canada
19 May - 08 Jun	Finnair

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 502€

Return flights