The average bus between Portlaoise and Castleknock takes 2h 33m and the fastest bus takes 2h 5m. The bus service runs several times per day from Portlaoise 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 4 hours between Portlaoise and Castleknock. The earliest departure is at 5:30 AM in the morning, and the last departure from Portlaoise is at 7:15 PM which arrives into Castleknock at 9:35 PM. All services require a transfer at Eden Quay and take an average of 2h 33m. The schedules shown below are for the next available departures.

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2h 30m • 1 changeWant to know about travelling from Portlaoise 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 Portlaoise to Castleknock. However, there are services departing from Portlaoise station and arriving at Castleknock station via Eden Quay. The journey, including transfers, takes approximately 2h 33m.
Portlaoise to Castleknock bus services, operated by J.J.Kavanagh & Sons, depart from Portlaoise JFL Ave station.
Portlaoise to Castleknock bus services, operated by J.J.Kavanagh & Sons, arrive at St Brigid's Church station.
The distance between Portlaoise and Castleknock is 72.9 km. The road distance is 97 km.
You can take a bus from Portlaoise JFL Ave to St Brigid's Church via Eden Quay and Aston Quay in around 2h 38m.