The average train between Portmarnock and Belfast takes 3h 7m and the fastest train takes 2h 31m. There is a train service every few hours from Portmarnock to Belfast. 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 Portmarnock and Belfast. The earliest departure is at 6:24 AM in the morning, and the last departure from Portmarnock is at 11:44 PM which arrives into Belfast at 7:58 AM. All services require a transfer, and take on average 3h 7m. The schedules shown below are for the next available departures.

2h 38m • 1 change

3h 33m • 1 change

2h 33m • 1 change

2h 33m • 1 change

2h 36m • 1 change

2h 31m • 1 change

2h 31m • 1 change

2h 31m • 1 change

2h 34m • 1 change

2h 42m • 1 change

2h 34m • 1 change

2h 45m • 1 change

2h 34m • 1 change

2h 45m • 1 change

2h 34m • 1 change

2h 45m • 1 change
Want to know about travelling from Portmarnock to Belfast? 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 Portmarnock to Belfast. However, there are services departing from Portmarnock station and arriving at Belfast station via Belfast Great Central. The journey, including transfers, takes approximately 3h 7m.
Portmarnock to Belfast train services, operated by Iarnród Éireann (Irish Rail), depart from Dublin Connolly station.
Portmarnock to Belfast train services, operated by Iarnród Éireann (Irish Rail), arrive at Belfast Great Central station.
The distance between Portmarnock and Belfast is 131.4 km. The road distance is 190 km.
Translink operates a train from Dublin Connolly to Belfast Great Central hourly. Tickets cost £17–25 and the journey takes 2h 8m. Iarnród Éireann (Irish Rail) also services this route hourly.