Bus Eireann operates a train from Knock Airport (NOC) to Dublin every 4 hours. Tickets cost $4 - $5 and the journey takes 27 min. Irish Rail also services this route 5 times a day. Alternatively, Bus Eireann operates a bus from Knock Airport (NOC) to Dublin every 3 hours. Tickets cost $1 - $2 and the journey takes 10 min. Bus Eireann also services this route 3 times a day.
From Lurga, Knock Airport line 440 bus to Claremorris, Claremorris Dalton Street, walk to Claremorris Train Station, then train to Heuston Train Station. 4 h 16 min 51€. From Lurga, Knock Airport line 440 bus to Charlestown then bus to Dublin, Eden Quay. 4 h 17 min 22€. From Knock Airport (NOC) drive to Dublin. 2 h 27 min 29€.