The average bus between Arklow and Castleknock takes 2h 14m and the fastest bus takes 1h 50m. There is a bus service every few hours from Arklow 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 hourly between Arklow and Castleknock. The earliest departure is at 5:07 AM in the morning, and the last departure from Arklow is at 9:43 PM which arrives into Castleknock at 11:59 PM. All services require a transfer at Clare Street and take an average of 2h 14m. The schedules shown below are for the next available departures.

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1h 59m • 1 changeWant to know about travelling from Arklow 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 Arklow to Castleknock. However, there are services departing from Arklow station and arriving at St Brigid's Church station via Clare Street station. The journey, including transfers, takes approximately 2h 14m.
Arklow to Castleknock bus services, operated by Expressway (Bus Éireann), depart from Arklow station.
Arklow to Castleknock bus services, operated by Dublin Bus, arrive at St Brigid's Church station.
The distance between Arklow and Castleknock is 65.4 km. The road distance is 78 km.
You can take a bus from Arklow to St Brigid's Church via Clare Street and National Gallery in around 2h 13m.