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Mermaid Quay to Cardiff Castle buses

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Trip Overview

The average bus between Mermaid Quay and Cardiff Castle takes 36 min and the fastest bus takes 13 min. There is a bus service every few hours from Mermaid Quay 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.

36 min
Duration
2 mi
Distance
£5
Average price
Hourly
Frequency

Line 304 bus, bus

best
  1. Take the bus from The Flourish to Cardiff Bus Interchange Bay 1bus bus 304
  2. Take the bus from Cardiff Bus Interchange Bay 9 to Cardiff Bridge KRbus bus 13 / ...
20 min
£4–6

Mermaid Quay to Cardiff Castle bus times

Buses run hourly between Mermaid Quay and Cardiff Castle. The earliest departure is at 12:33 AM at night, and the last departure from Mermaid Quay is at 10:54 PM which arrives into Cardiff Castle at 11:33 PM. All services require a transfer at The Flourish and take an average of 36 min. The schedules shown below are for the next available departures.

Departing Friday, October 16, 2026

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    First South & West WalesCardiff Bus14 min • 1 change

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    First South & West WalesCardiff Bus14 min • 1 change

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    First South & West WalesFirst South & West Wales13 min • 1 change

  •  → 

    First South & West WalesCardiff Bus14 min • 1 change
  • Show more

Departing Saturday, October 17, 2026

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    First South & West WalesCardiff Bus4h 55m • 1 change

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    First South & West WalesCardiff Bus14 min • 1 change

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    First South & West WalesCardiff Bus13 min • 1 change

  •  → 

    First South & West WalesFirst South & West Wales13 min • 1 change
  • Show more

Departing Sunday, October 18, 2026

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    First South & West WalesCardiff Bus6h 1m • 1 change

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    First South & West WalesCardiff Bus21 min • 1 change

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    First South & West WalesCardiff Bus14 min • 1 change

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    First South & West WalesCardiff Bus17 min • 1 change
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Departing Monday, October 19, 2026

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    First South & West WalesCardiff Bus4h 53m • 1 change

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    First South & West WalesCardiff Bus14 min • 1 change

  •  → 

    First South & West WalesCardiff Bus14 min • 1 change

  •  → 

    First South & West WalesFirst South & West Wales13 min • 1 change
  • Show more

Frequently asked questions

Want to know about travelling from Mermaid Quay 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.

Map of how to get from Mermaid Quay to Cardiff Castle.ExpandLaunch map view
  • Distance: 2 mi
  • Duration: 36 min

What companies run services between Mermaid Quay, Wales and Cardiff Castle, Wales?

You can take a vehicle from Mermaid Quay to Cardiff Castle via The Flourish, Cardiff Bus Interchange Bay 1, Cardiff Bus Interchange Bay 9, and Cardiff Bridge KR in around 20 min.

Operators