The average bus between Donegal and Castlebar takes 3h 55m and the fastest bus takes 2h 50m. The bus service runs several times per day from Donegal 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 4 times a day between Donegal and Castlebar. The earliest departure is at 8:40 AM in the morning, and the last departure from Donegal is at 5:15 PM which arrives into Castlebar at 8:15 PM. All services require a transfer, and take on average 3h 55m. The schedules shown below are for the next available departures.

3h 34m • 1 change

3h 25m • 1 change

3h 30m • 1 change

4h • 1 change

3h 34m • 1 change

3h 30m • 1 change

4h • 1 change

3h • 1 change

3h 34m • 1 change

3h 25m • 1 change

3h 25m • 1 change

4h • 1 change
Want to know about travelling from Donegal 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 Donegal to Castlebar. However, there are services departing from Donegal station and arriving at Castlebar station via Claremorris. The journey, including transfers, takes approximately 3h 55m.
Donegal to Castlebar bus services, operated by Expressway (Bus Éireann), depart from Donegal station.
Donegal to Castlebar bus services, operated by Expressway (Bus Éireann), arrive at Claremorris station.
The distance between Donegal and Castlebar is 117.5 km. The road distance is 173 km.
Expressway (Bus Éireann) operates a bus from Donegal to Claremorris 3 times a day. Tickets cost €20–28 and the journey takes 2h 38m. Bus Feda Teoranta also services this route twice daily.