Irish Rail operates a train from Dublin to Newtownards every 4 hours. Tickets cost $35 - $55 and the journey takes 2 h 10 min. Translink UK also services this route hourly. Alternatively, Aircoach operates a bus from Dublin to Newtownards every 15 minutes. Tickets cost $16 - $23 and the journey takes 2 h 20 min. 2 other operators also service this route.
How to get from Dublin to Newtownards
From Connolly Train Station train to Belfast Central Train Station, walk to Belfast Laganside Buscentre, then line 5 bus to Newtownards. 3 h 19 min 44€. From The Gresham Hotel bus to Belfast Europa Bus Centre then line 7 bus to Newtownards. 3 h 34 min 21€. From Dublin drive to Newtownards. 1 h 58 min 24€.