The average train between Llanelli and Portsmouth takes 6h 19m and the fastest train takes 5h 11m. The train service runs several times per day from Llanelli to Portsmouth. 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 4 hours between Llanelli and Portsmouth. The earliest departure is at 5:56 AM in the morning, and the last departure from Llanelli is at 7:28 PM which arrives into Portsmouth at 8:44 AM. All services require a transfer, and take on average 6h 19m. The schedules shown below are for the next available departures.

5h 44m • 1 change

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5h 50m • 1 change

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5h 17m • 1 change

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5h 29m • 1 change
Want to know about travelling from Llanelli to Portsmouth? 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 Llanelli to Portsmouth. However, there are services departing from Llanelli station and arriving at Portsmouth station via Bristol Temple Meads. The journey, including transfers, takes approximately 6h 19m.
Llanelli to Portsmouth train services, operated by Transport for Wales, depart from Llanelli station.
Llanelli to Portsmouth train services, operated by Transport for Wales, arrive at Portsmouth & Southsea station.
Book your Llanelli to Portsmouth train tickets online with Transport for Wales and Great Western Railway (GWR).
The distance between Llanelli and Portsmouth is 235.2 km. The road distance is 315 km.
You can take a train from Llanelli to Portsmouth & Southsea via Bristol Temple Meads in around 5h 20m.