The average train between Portsmouth and Llanelli takes 5h 38m and the fastest train takes 4h 49m. There is a train service every few hours from Portsmouth 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 hourly between Portsmouth and Llanelli. The earliest departure is at 6:05 AM in the morning, and the last departure from Portsmouth is at 8:28 PM which arrives into Llanelli at 7:13 AM. All services require a transfer, and take on average 5h 38m. The schedules shown below are for the next available departures.

5h 15m • 1 change

5h 33m • 1 change

5h 33m • 1 change

4h 55m • 1 change

5h 15m • 1 change

5h 33m • 1 change

5h 33m • 1 change

4h 55m • 1 change

5h 15m • 1 change

5h 33m • 1 change

5h 33m • 1 change

4h 55m • 1 change

5h 15m • 1 change

5h 33m • 1 change

5h 33m • 1 change

4h 55m • 1 change
Want to know about travelling from Portsmouth 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 Portsmouth to Llanelli. However, there are services departing from Portsmouth station and arriving at Llanelli station via Cardiff Central. The journey, including transfers, takes approximately 5h 38m.
Portsmouth to Llanelli train services, operated by Great Western Railway (GWR), depart from Portsmouth & Southsea station.
Portsmouth to Llanelli train services, operated by Great Western Railway (GWR), arrive at Llanelli station.
Book your Portsmouth to Llanelli train tickets online with Great Western Railway (GWR) and Transport for Wales.
The distance between Portsmouth and Llanelli is 235.2 km. The road distance is 315 km.
You can take a train from Portsmouth & Southsea to Llanelli via Cardiff Central in around 5h 2m.