The average bus between Belfast and Castletroy takes 4h 38m and the fastest bus takes 4h 35m. There is a bus service every few hours from Belfast to Castletroy. 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 2 hours between Belfast and Castletroy. The earliest departure is at 1:50 AM at night, and the last departure from Belfast is at 9:50 PM which arrives into Castletroy at 2:55 AM. All services require a transfer at Dublin Airport Terminal 1 Zone 1 and take an average of 4h 38m. The schedules shown below are for the next available departures.

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Want to know about travelling from Belfast to Castletroy? 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 Belfast to Castletroy. However, there are services departing from Belfast station and arriving at Castletroy station via Dublin Airport Terminal 1 Zone 1. The journey, including transfers, takes approximately 4h 38m.
Belfast to Castletroy bus services, operated by Dublin Express, depart from Grand Central Station.
Belfast to Castletroy bus services, operated by Dublin Express, arrive at Elm Park station.
The distance between Belfast and Castletroy is 276.6 km. The road distance is 360 km.
You can take a bus from Grand Central Station to Elm Park via Dublin Airport Terminal 1 Zone 1 and Dublin Airport Zone 10 in around 5h 20m.