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

Return flights

09 May - 13 May	Finnair
16 May - 24 May	British Airways
05 May - 17 May	British Airways
07 May - 16 May	British Airways
26 May - 03 Jun	British Airways
27 May - 04 Jun	British Airways
15 May - 24 May	British Airways
25 May - 02 Jun	British Airways
21 May - 24 May	British Airways
21 May - 31 May	British Airways
28 May - 05 Jun	Finnair
23 May - 31 May	British Airways
29 May - 06 Jun	British Airways
31 May - 08 Jun	British Airways
29 May - 20 Jun	British Airways
30 May - 07 Jun	Finnair

Also check the deals for one-way flights from Phoenix 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 Phoenix to Barcelona in May from $605

Return flights