Cheapest return flights from Philadelphia to Madrid in May from 700€

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

Return flights

10 May - 19 May jetBlue
06 May - 13 May Frontier Airlines
04 May - 18 May Spirit Airlines
10 May - 18 May Spirit Airlines
19 May - 27 May Frontier Airlines
06 May - 13 May British Airways direct
20 May - 01 Jun WestJet
21 May - 31 May WestJet
19 May - 27 May Finnair direct
15 May - 30 May Delta
22 May - 30 May Spirit Airlines
20 May - 01 Jun British Airways direct

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

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