The average bus between Cardiff Bay and Cardiff Castle takes 48 min and the fastest bus takes 14 min. There is a bus service every few hours from Cardiff Bay to Cardiff 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 hourly between Cardiff Bay and Cardiff Castle. The earliest departure is at 12:32 AM at night, and the last departure from Cardiff Bay is at 9:51 PM which arrives into Cardiff Castle at 10:23 PM. All services require a transfer at Cardiff Bus Interchange Bay 1 and take an average of 48 min. The schedules shown below are for the next available departures.

18 min • 1 change
26 min • 1 change
14 min • 1 change
32 min • 1 change
6h 28m • 1 change
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14 min • 1 change
6h 28m • 1 change
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6h 28m • 1 change
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26 min • 1 change
14 min • 1 changeWant to know about travelling from Cardiff Bay to Cardiff 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 Cardiff Castle. However, there are services departing from Cardiff Bay station and arriving at Cardiff Castle station via Cardiff Bus Interchange Bay 1. The journey, including transfers, takes approximately 48 min.
Cardiff Bay to Cardiff Castle bus services, operated by First South & West Wales, depart from Mount Stuart Square station.
Cardiff Bay to Cardiff Castle bus services, operated by First South & West Wales, arrive at Cardiff Bridge KR station.
The distance between Cardiff Bay and Cardiff Castle is 2.5 km. The road distance is 3 km.
You can take a bus from Mount Stuart Square to Cardiff Castle via Cardiff Bus Interchange Bay 1, Cardiff Bus Interchange Bay 14, and Cardiff Bridge KR in around 20 min.