The average bus between Cardiff and Portbury takes 2h 8m and the fastest bus takes 1h 52m. The bus service runs several times per day from Cardiff to Portbury. 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 and Portbury. The earliest departure is at 4:30 AM at night, and the last departure from Cardiff is at 11:40 PM which arrives into Portbury at 1:46 AM. All services require a transfer, and take on average 2h 8m. The schedules shown below are for the next available departures.

2h 22m • 1 change

2h 12m • 1 change

2h 4m • 1 change

1h 52m • 1 change

2h 16m • 1 change

2h 24m • 1 change

2h 6m • 1 change

1h 56m • 1 change

2h 57m • 1 change

2h 4m • 1 change

2h 1m • 1 change

2h 1m • 1 change

2h 34m • 1 change

2h 4m • 1 change

2h 5m • 1 change

2h 11m • 1 change

2h 34m • 1 change

2h 4m • 1 change

2h 5m • 1 change

2h 11m • 1 change

2h 16m • 1 change

2h 24m • 1 change

2h 6m • 1 change

1h 56m • 1 change
Want to know about travelling from Cardiff to Portbury? 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 to Portbury. However, there are services departing from Cardiff station and arriving at Portbury station via Bus Station station. The journey, including transfers, takes approximately 2h 8m.
Cardiff to Portbury bus services, operated by National Express, depart from Sophia Gardens station.
Cardiff to Portbury bus services, operated by National Express, arrive at Station Road.
The distance between Cardiff and Portbury is 31.7 km. The road distance is 83 km.
You can take a bus from Sophia Gardens to Station Road via Bus Station in around 1h 50m.