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

Return flights

07 May - 30 May	TAP
08 May - 30 May	TAP
25 May - 08 Jun	TAP
21 May - 27 May	Condor
18 May - 13 Jun	TAP
31 May - 04 Jun	TAP
28 May - 11 Jun	TAP
26 May - 20 Jun	TAP
07 May - 30 May	Iberia	direct
28 May - 11 Jun	Iberia	direct
25 May - 08 Jun	Iberia	direct
26 May - 20 Jun	Iberia	direct
31 May - 04 Jun	Iberia	direct
08 May - 30 May	Finnair	direct

Also check the deals for one-way flights from Philadelphia to Barcelona 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 Barcelona in May from $766

Return flights