The average train between Portadown and Castleknock takes 2h 21m and the fastest train takes 2h 1m. There is a train service every few hours from Portadown 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 Portadown and Castleknock. The earliest departure is at 6:28 AM in the morning, and the last departure from Portadown is at 9:33 PM which arrives into Castleknock at 11:47 PM. All services require a transfer, and take on average 2h 21m. The schedules shown below are for the next available departures.

2h 20m • 1 change

2h 36m • 1 change

2h 1m • 1 change

2h 1m • 1 change

2h 20m • 1 change

2h 36m • 1 change

2h 1m • 1 change

2h 1m • 1 change

2h 20m • 1 change

2h 36m • 1 change

2h 1m • 1 change

2h 1m • 1 change

2h 20m • 1 change

2h 36m • 1 change

2h 1m • 1 change

2h 1m • 1 change
Want to know about travelling from Portadown 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 Portadown to Castleknock. However, there are services departing from Portadown station and arriving at Castleknock station via Dublin Connolly. The journey, including transfers, takes approximately 2h 21m.
Portadown to Castleknock train services, operated by Translink, depart from Portadown station.
Portadown to Castleknock train services, operated by Translink, arrive at Dublin Connolly station.
The distance between Portadown and Castleknock is 116.9 km. The road distance is 149 km.
Iarnród Éireann (Irish Rail) operates a train from Portadown to Dublin Connolly hourly. Tickets cost €12–18 and the journey takes 1h 43m. Translink also services this route hourly.