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

Return flights

12 May - 15 May	Ryanair	direct
12 May - 22 May	Ryanair	direct
12 May - 20 May	Ryanair	direct
12 May - 21 May	Ryanair	direct
12 May - 24 May	Ryanair	direct
19 May - 24 May	Iberia
25 May - 29 May	KLM
12 May - 17 May	Ryanair	direct
31 May - 10 Jun	SWISS
04 May - 15 May	KLM
15 May - 22 May	KLM
30 May - 13 Jun	SWISS
28 May - 06 Jun	SWISS
28 May - 05 Jun	SWISS
29 May - 05 Jun	SWISS
14 May - 03 Jun	Ryanair	direct
31 May - 07 Jun	KLM
29 May - 01 Jun	SWISS
19 May - 05 Jun	Ryanair	direct
25 May - 05 Jun	Ryanair	direct

Also check the deals for one-way flights from Dublin 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 Dublin to Barcelona in May from $180

Return flights