The average train between Cardiff and Sudbury takes 4h 25m and the fastest train takes 3h 27m. There is a train service every few hours from Cardiff to Sudbury. 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 Sudbury. The earliest departure is at 5:14 AM in the morning, and the last departure from Cardiff is at 9:20 PM which arrives into Sudbury at 6:20 AM. All services require a transfer at London Paddington and take an average of 4h 25m. The schedules shown below are for the next available departures.



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4h 2m • 3 changesWant to know about travelling from Cardiff to Sudbury? 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 Sudbury. However, there are services departing from Cardiff Central station and arriving at Marks Tey station via London Paddington station. The journey, including transfers, takes approximately 4h 25m.
Cardiff to Sudbury train services, operated by Great Western Railway (GWR), depart from Cardiff Central station.
Cardiff to Sudbury train services, operated by Greater Anglia, arrive at Marks Tey station.
Book your Cardiff to Sudbury train tickets online with Omio.
The distance between Cardiff and Sudbury is 276.2 km. The road distance is 341 km.
You can take a train from Cardiff Central to Sudbury (Suffolk) via London Paddington, Stratford (London), and Marks Tey in around 4h 25m.