The average train between Castleknock and Arklow takes 2h 23m and the fastest train takes 2h 11m. The train service runs several times per day from Castleknock to Arklow. 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 Castleknock and Arklow. The earliest departure is at 7:12 AM in the morning, and the last departure from Castleknock is at 7:29 PM which arrives into Arklow at 9:47 PM. All services require a transfer, and take on average 2h 23m. The schedules shown below are for the next available departures.

2h 16m • 1 change

2h 11m • 1 change

2h 19m • 1 change

2h 14m • 1 change

2h 16m • 1 change

2h 11m • 1 change

2h 19m • 1 change

2h 14m • 1 change

2h 16m • 1 change

2h 11m • 1 change

2h 19m • 1 change

2h 14m • 1 change

2h 16m • 1 change

2h 11m • 1 change

2h 19m • 1 change

2h 14m • 1 change
Want to know about travelling from Castleknock to Arklow? 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 Castleknock to Arklow. However, there are services departing from Castleknock station and arriving at Arklow station via Arklow. The journey, including transfers, takes approximately 2h 23m.
Castleknock to Arklow train services, operated by Iarnród Éireann (Irish Rail), depart from Dublin Connolly station.
Castleknock to Arklow train services, operated by Iarnród Éireann (Irish Rail), arrive at Arklow station.
The distance between Castleknock and Arklow is 65.4 km. The road distance is 91 km.
Iarnród Éireann (Irish Rail) operates a train from Dublin Connolly to Arklow 5 times a day. Tickets cost €8–12 and the journey takes 1h 43m.