The average train between Howth and Castleknock takes 1h 8m and the fastest train takes 47 min. There is a train service every few hours from Howth 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 hourly between Howth and Castleknock. The earliest departure is at 6:00 AM in the morning, and the last departure from Howth is at 11:55 PM which arrives into Castleknock at 5:45 AM. All services require a transfer, and take on average 1h 8m. The schedules shown below are for the next available departures.

1h 2m • 1 change

55 min • 1 change

51 min • 1 change

1h 4m • 1 change

51 min • 1 change

1h 5m • 1 change

51 min • 1 change

56 min • 1 change

51 min • 1 change

1h 5m • 1 change

51 min • 1 change

56 min • 1 change
Want to know about travelling from Howth 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 Howth to Castleknock. However, there are services departing from Howth station and arriving at Castleknock station via Dublin Connolly. The journey, including transfers, takes approximately 1h 8m.
Howth to Castleknock train services, operated by Iarnród Éireann (Irish Rail), depart from Howth station.
Howth to Castleknock train services, operated by Iarnród Éireann (Irish Rail), arrive at Castleknock station.
The distance between Howth and Castleknock is 19.8 km. The road distance is 23 km.
You can take a train from Howth to Castleknock via Dublin Connolly in around 1h 5m.