The average train between Cardiff and Diss takes 4h 36m and the fastest train takes 3h 52m. There is a train service every few hours from Cardiff to Diss. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run hourly between Cardiff and Diss. The earliest departure is at 5:54 AM in the morning, and the last departure from Cardiff is at 9:20 PM which arrives into Diss at 7:28 AM. All services require a transfer at London Paddington and take an average of 4h 36m. The schedules shown below are for the next available departures.


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Want to know about travelling from Cardiff to Diss? 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 train from Cardiff to Diss. However, there are services departing from Cardiff station and arriving at Diss station via London Paddington. The journey, including transfers, takes approximately 4h 36m.
Cardiff to Diss train services, operated by Great Western Railway (GWR), depart from Cardiff Central station.
Cardiff to Diss train services, operated by Great Western Railway (GWR), arrive at Diss station.
Book your Cardiff to Diss train tickets online with Great Western Railway (GWR), London Underground (Tube) and Greater Anglia.
The distance between Cardiff and Diss is 310.5 km. The road distance is 398 km.
You can take a train from Cardiff Central to Diss via London Paddington, Paddington station, Liverpool Street station, and London Liverpool Street in around 4h 35m.