The average bus between Castlebar and Letterkenny takes 4h 30m and the fastest bus takes 3h 35m. The bus service runs several times per day from Castlebar to Letterkenny. 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 Castlebar and Letterkenny. The earliest departure is at 6:10 AM in the morning, and the last departure from Castlebar is at 6:45 PM which arrives into Letterkenny at 11:50 PM. All services require a transfer, and take on average 4h 30m. The schedules shown below are for the next available departures.

4h 20m • 1 change
4h 55m • 1 change
4h 35m • 1 change
3h 35m • 1 change
4h 20m • 1 change
4h 55m • 1 change
4h 35m • 1 change
3h 35m • 1 change
4h 20m • 1 change
4h 55m • 1 change
4h 35m • 1 change
5h 15m • 1 changeWant to know about travelling from Castlebar to Letterkenny? 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 Castlebar to Letterkenny. However, there are services departing from Castlebar station and arriving at Letterkenny station via Letterkenny Bus. The journey, including transfers, takes approximately 4h 30m.
Castlebar to Letterkenny bus services, operated by Citylink, depart from Claremorris station.
Castlebar to Letterkenny bus services, operated by Citylink, arrive at Letterkenny Bus station.
The distance between Castlebar and Letterkenny is 158.2 km. The road distance is 219 km.
Bus Feda Teoranta operates a bus from Claremorris to Letterkenny Bus twice daily. Tickets cost €23–28 and the journey takes 3h. Expressway (Bus Éireann) also services this route twice daily.