Irish Rail operates a train from Dublin to Cobh hourly. Tickets cost $55 - $80 and the journey takes 2 h 35 min. Irish Rail also services this route hourly. Alternatively, Aircoach operates a bus from Dublin to Cobh every 15 minutes. Tickets cost $20 - $28 and the journey takes 3 h. 2 other operators also service this route.
From Heuston Train Station train to Cork Kent Train Station then train to Cobh Train Station. 3 h 33 min 62€. From Dublin bus to Saint Patricks Quay, Saint Patricks Quay then line 200 bus to Cobh, Park Lane. 3 h 47 min 23€. From Dublin drive to Cobh. 2 h 38 min 35€.