The average train between Castleknock and Dundalk takes 2h 2m and the fastest train takes 1h 22m. There is a train service every few hours from Castleknock to Dundalk. 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 hourly between Castleknock and Dundalk. The earliest departure is at 6:19 AM in the morning, and the last departure from Castleknock is at 11:37 PM which arrives into Dundalk at 6:49 AM. All services require a transfer, and take on average 2h 2m. The schedules shown below are for the next available departures.

1h 44m • 1 change

1h 32m • 1 change
Arrives next day

7h 17m • 1 change

1h 22m • 1 change

1h 53m • 1 change

1h 31m • 1 change

1h 47m • 1 change

1h 22m • 1 change

1h 53m • 1 change

1h 31m • 1 change

1h 47m • 1 change

1h 22m • 1 change

1h 53m • 1 change

1h 31m • 1 change

1h 47m • 1 change
Want to know about travelling from Castleknock to Dundalk? 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 Dundalk. However, there are services departing from Castleknock station and arriving at Dundalk station via Dublin Connolly. The journey, including transfers, takes approximately 2h 2m.
Castleknock to Dundalk train services, operated by Iarnród Éireann (Irish Rail), depart from Castleknock station.
Castleknock to Dundalk train services, operated by Iarnród Éireann (Irish Rail), arrive at Dundalk station.
The distance between Castleknock and Dundalk is 69.8 km. The road distance is 96 km.
You can take a train from Castleknock to Dundalk via Dublin Connolly in around 1h 45m.