The average train between Dundalk and Castlerock takes 3h 43m and the fastest train takes 2h 59m. There is a train service every few hours from Dundalk to Castlerock. 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 Dundalk and Castlerock. The earliest departure is at 6:51 AM in the morning, and the last departure from Dundalk is at 10:13 PM which arrives into Castlerock at 8:50 AM. All services require a transfer, and take on average 3h 43m. The schedules shown below are for the next available departures.

2h 59m • 1 change

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Arrives next day

9h 59m • 1 change

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2h 59m • 1 change

3h 4m • 1 change

2h 59m • 1 change

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3h • 1 change

3h • 1 change

3h • 1 change

2h 59m • 1 change

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Want to know about travelling from Dundalk to Castlerock? 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 Dundalk to Castlerock. However, there are services departing from Dundalk station and arriving at Castlerock station via Belfast Great Central. The journey, including transfers, takes approximately 3h 43m.
Dundalk to Castlerock train services, operated by Translink, depart from Dundalk station.
Dundalk to Castlerock train services, operated by Translink, arrive at Castlerock station.
The distance between Dundalk and Castlerock is 131.7 km. The road distance is 201 km.
You can take a train from Dundalk to Castlerock via Belfast Great Central in around 3h 37m.