The average bus between South Dublin and Castlebar takes 4h 28m and the fastest bus takes 4h 5m. The bus service runs several times per day from South Dublin to Castlebar. 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 South Dublin and Castlebar. The earliest departure is at 6:34 AM in the morning, and the last departure from South Dublin is at 11:50 PM which arrives into Castlebar at 11:00 AM. All services require a transfer at Lrd Edward St and take an average of 4h 28m. The schedules shown below are for the next available departures.

4h 8m • 1 change

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Want to know about travelling from South Dublin to Castlebar? 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 South Dublin to Castlebar. However, there are services departing from South Dublin station and arriving at Castlebar station via Castlebar. The journey, including transfers, takes approximately 4h 28m.
South Dublin to Castlebar bus services, operated by Dublin Bus, depart from Crampton Quay station.
South Dublin to Castlebar bus services, operated by Dublin Bus, arrive at Castlebar station.
The distance between South Dublin and Castlebar is 205.1 km. The road distance is 255 km.
Citylink operates a bus from Crampton Quay to Castlebar every 4 hours. Tickets cost €21–30 and the journey takes 3h 30m.