The average train between Carmarthen and Seaford takes 6h 39m and the fastest train takes 5h 42m. There is a train service every few hours from Carmarthen to Seaford. 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 Carmarthen and Seaford. The earliest departure is at 4:37 AM at night, and the last departure from Carmarthen is at 10:41 PM which arrives into Seaford at 9:20 AM. All services require a transfer at Swansea and take an average of 6h 39m. The schedules shown below are for the next available departures.




5h 42m • 4 changes




5h 45m • 4 changes




5h 56m • 4 changes




5h 49m • 4 changes




5h 42m • 4 changes




5h 45m • 4 changes




5h 56m • 4 changes




5h 49m • 4 changes




5h 42m • 4 changes




5h 45m • 4 changes




5h 56m • 4 changes




5h 49m • 4 changes
Want to know about travelling from Carmarthen to Seaford? 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 Carmarthen to Seaford. However, there are services departing from Carmarthen station and arriving at Seaford station via Swansea. The journey, including transfers, takes approximately 6h 39m.
Carmarthen to Seaford train services, operated by Transport for Wales, depart from Carmarthen station.
Carmarthen to Seaford train services, operated by Transport for Wales, arrive at Lewes station.
Book your Carmarthen to Seaford train tickets online with Transport for Wales, Great Western Railway (GWR) and 2 other operators.
The distance between Carmarthen and Seaford is 329.2 km. The road distance is 457 km.
You can take a train from Carmarthen to Seaford via Swansea, London Paddington, Paddington station, Victoria station, London Victoria, and Lewes in around 6h 36m.