The average bus between Portmarnock and Castleknock takes 1h 27m and the fastest bus takes 59 min. The bus runs at least 2 times per hour from Portmarnock 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.
Buses run every 30 minutes between Portmarnock and Castleknock. The earliest departure is at 5:27 AM in the morning, and the last departure from Portmarnock is at 10:57 PM which arrives into Castleknock at 11:59 PM. All services require a transfer at Abbey St Lower and take an average of 1h 27m. The schedules shown below are for the next available departures.

1h 21m • 1 change

1h 21m • 1 change

1h 19m • 1 change

1h 15m • 1 change

1h 25m • 1 change

1h 18m • 1 change

1h 14m • 1 change

1h 30m • 1 change

1h 25m • 1 change

1h 18m • 1 change

1h 14m • 1 change

1h 30m • 1 change
Want to know about travelling from Portmarnock 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 bus from Portmarnock to Castleknock. However, there are services departing from Portmarnock station and arriving at Castleknock station via Abbey St Lower. The journey, including transfers, takes approximately 1h 27m.
Portmarnock to Castleknock bus services, operated by Dublin Bus, depart from Portmarnock Village station.
Portmarnock to Castleknock bus services, operated by Dublin Bus, arrive at St Brigid's Church station.
The distance between Portmarnock and Castleknock is 16 km. The road distance is 26 km.
You can take a bus from Portmarnock Village to St Brigid's Church via Abbey St Lower and Aston Quay in around 1h 34m.