The average bus between Cardiff Bay and Caerphilly Castle takes 2h 3m and the fastest bus takes 1h 21m. There is a bus service every few hours from Cardiff Bay to Caerphilly Castle. 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 Cardiff Bay and Caerphilly Castle. The earliest departure is at 12:32 AM at night, and the last departure from Cardiff Bay is at 7:54 PM which arrives into Caerphilly Castle at 9:39 PM. All services require a transfer at Cardiff Bus Interchange Bay 1 and take an average of 2h 3m. The schedules shown below are for the next available departures.

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1h 23m • 1 changeWant to know about travelling from Cardiff Bay to Caerphilly Castle? 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 Cardiff Bay to Caerphilly Castle. However, there are services departing from Cardiff Bay station and arriving at Caerphilly Castle station via Cardiff Bus Interchange Bay 1. The journey, including transfers, takes approximately 2h 3m.
Cardiff Bay to Caerphilly Castle bus services, operated by First South & West Wales, depart from Mount Stuart Square station.
Cardiff Bay to Caerphilly Castle bus services, operated by First South & West Wales, arrive at The Piccadilly station.
The distance between Cardiff Bay and Caerphilly Castle is 13.1 km. The road distance is 21 km.
You can take a bus from Mount Stuart Square to Caerphilly Castle via Cardiff Bus Interchange Bay 1, Greyfriars Road GJ, and The Piccadilly in around 1h 41m.