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

Return flights

04 Mar - 11 Mar	Iberia	direct
10 Mar - 17 Mar	Iberia	direct
04 Mar - 09 Mar	Finnair
10 Mar - 23 Mar	Finnair
11 Mar - 18 Mar	Delta
18 Mar - 23 Mar	Finnair
11 Mar - 24 Mar	British Airways
01 Mar - 08 Mar	Iberia	direct
12 Mar - 18 Mar	Delta
25 Mar - 01 Apr	Iberia	direct
08 Mar - 14 Mar	Frontier Airlines
24 Mar - 04 Apr	TAP
27 Mar - 03 Apr	KLM
28 Mar - 05 Apr	Aer Lingus
27 Mar - 04 Apr	Frontier Airlines
27 Mar - 03 Apr	British Airways	direct
28 Mar - 05 Apr	British Airways	direct
24 Mar - 04 Apr	Iberia	direct
30 Mar - 06 Apr	Iberia	direct
27 Mar - 04 Apr	Iberia	direct

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

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 March from 443€

Return flights