The average train between Southampton and Llanelli takes 4h 59m and the fastest train takes 4h 10m. There is a train service every few hours from Southampton to Llanelli. 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 every 2 hours between Southampton and Llanelli. The earliest departure is at 6:47 AM in the morning, and the last departure from Southampton is at 9:12 PM which arrives into Llanelli at 11:19 AM. All services require a transfer, and take on average 4h 59m. The schedules shown below are for the next available departures.

4h 49m • 1 change
4h 11m • 1 change
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4h 41m • 1 change
4h 32m • 1 change
4h 47m • 1 change
4h 49m • 1 change
4h 11m • 1 change
4h 23m • 1 change
4h 12m • 1 change
4h 10m • 1 change
4h 11m • 1 change
4h 54m • 1 change
4h 33m • 1 change
4h 59m • 1 change
4h 26m • 1 change
4h 32m • 1 change
4h 47m • 1 change
4h 49m • 1 change
4h 11m • 1 changeWant to know about travelling from Southampton to Llanelli? 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 Southampton to Llanelli. However, there are services departing from Southampton station and arriving at Llanelli station via Cardiff Central. The journey, including transfers, takes approximately 4h 59m.
Southampton to Llanelli train services, operated by Great Western Railway (GWR), depart from Southampton Central station.
Southampton to Llanelli train services, operated by Great Western Railway (GWR), arrive at Llanelli station.
Book your Southampton to Llanelli train tickets online with Great Western Railway (GWR) and Transport for Wales.
The distance between Southampton and Llanelli is 210.3 km. The road distance is 275 km.
You can take a train from Southampton Central to Llanelli via Cardiff Central in around 4h 18m.