The average train between Castlerock and Dundalk takes 3h 37m and the fastest train takes 3h 2m. There is a train service every few hours from Castlerock 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 every 2 hours between Castlerock and Dundalk. The earliest departure is at 6:41 AM in the morning, and the last departure from Castlerock is at 9:08 PM which arrives into Dundalk at 9:23 AM. All services require a transfer, and take on average 3h 37m. The schedules shown below are for the next available departures.

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3h 3m • 1 changeWant to know about travelling from Castlerock 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 Castlerock to Dundalk. However, there are services departing from Castlerock station and arriving at Dundalk station via Belfast Grand Central. The journey, including transfers, takes approximately 3h 37m.
Castlerock to Dundalk train services, operated by Translink, depart from Castlerock station.
Castlerock to Dundalk train services, operated by Translink, arrive at Dundalk station.
The distance between Castlerock and Dundalk is 131.7 km. The road distance is 201 km.
You can take a train from Castlerock to Dundalk via Belfast Grand Central in around 3h 11m.