The average train between Arklow and Castleknock takes 3h 8m and the fastest train takes 2h 10m. The train service runs several times per day from Arklow to Castleknock. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run 5 times a day between Arklow and Castleknock. The earliest departure is at 5:58 AM in the morning, and the last departure from Arklow is at 10:33 PM which arrives into Castleknock at 6:16 AM. All services require a transfer, and take on average 3h 8m. The schedules shown below are for the next available departures.

2h 33m • 1 change

2h 39m • 1 change

2h 33m • 1 change

2h 15m • 1 change

2h 33m • 1 change

2h 39m • 1 change

2h 33m • 1 change

2h 15m • 1 change

2h 33m • 1 change

2h 39m • 1 change

2h 33m • 1 change

2h 15m • 1 change

2h 33m • 1 change

2h 39m • 1 change

2h 33m • 1 change

2h 15m • 1 change
Want to know about travelling from Arklow to Castleknock? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct train from Arklow to Castleknock. However, there are services departing from Arklow station and arriving at Castleknock station via Dublin Connolly. The journey, including transfers, takes approximately 3h 8m.
Arklow to Castleknock train services, operated by Iarnród Éireann (Irish Rail), depart from Arklow station.
Arklow to Castleknock train services, operated by Iarnród Éireann (Irish Rail), arrive at Dublin Connolly station.
The distance between Arklow and Castleknock is 65.4 km. The road distance is 91 km.
Iarnród Éireann (Irish Rail) operates a train from Arklow to Dublin Connolly 5 times a day. Tickets cost €8–12 and the journey takes 1h 45m.