Bus from Belfast airport to dublin blackrock?

Hi is it possible i can get a bus from belfast airport into dublin, I know aircoach go from dublin airport to the city however it's my first time flying into belfast and I need to catch a bus to dublin. Is this possible?

I don't think there is a direct bus from Belfast airport (and I presume you mean international airport or else you would have said George Best) to Dublin city. Your best bet might be to buy a Leap card at Dublin airport, get a 16 bus into O'Connell Street and then to get to Blackrock there are several options, maybe you could get the number 7 Dublin Bus from O'Connell St or get a train from Connolly Station which is only a five or 10 minute walk from O'Connell St. An alternative is to get a bus from Belfast airport to Belfast train station and a train to Connolly and then a train from there to Blackrock. Either way it is three journeys.

Thank you for your help, I am actually taking the ferry then bus to europa bus station and heading to dublin from there.