AirHint found the following cheapest one-way flights from Barcelona (BCN) to Dublin (DUB) in September 2025 (see full year).

One-Way flights

30 Sep	Vueling Airlines	direct
13 Sep	Vueling Airlines	direct
16 Sep	Vueling Airlines	direct
17 Sep	Vueling Airlines	direct
05 Sep	Vueling Airlines	direct
02 Sep	Vueling Airlines	direct
07 Sep	Vueling Airlines	direct
03 Sep	Ryanair	direct
04 Sep	Ryanair	direct
01 Sep	Vueling Airlines	direct

Also check the deals for return flights from Barcelona to Dublin in September.

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 one-way flights from Barcelona to Dublin in September from $26

One-Way flights