The average train between Llanelli and Slough takes 3h 49m and the fastest train takes 3h 12m. There is a train service every few hours from Llanelli to Slough. 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 Llanelli and Slough. The earliest departure is at 5:01 AM in the morning, and the last departure from Llanelli is at 11:11 PM which arrives into Slough at 7:21 AM. All services require a transfer at Swansea and take an average of 3h 49m. The schedules shown below are for the next available departures.


3h 12m • 2 changes


3h 47m • 2 changes


3h 26m • 2 changes


3h 32m • 2 changes


3h 12m • 2 changes


3h 47m • 2 changes


3h 26m • 2 changes


3h 32m • 2 changes


3h 19m • 2 changes


3h 23m • 2 changes


3h 26m • 2 changes


3h 27m • 2 changes
Want to know about travelling from Llanelli to Slough? 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 Slough. However, there are services departing from Llanelli station and arriving at Slough station via Reading. The journey, including transfers, takes approximately 3h 49m.
Llanelli to Slough train services, operated by Transport for Wales, depart from Swansea station.
Llanelli to Slough train services, operated by Transport for Wales, arrive at Reading station.
Book your Llanelli to Slough train tickets online with Transport for Wales, Great Western Railway (GWR) and Elizabeth Line (TfL).
The distance between Llanelli and Slough is 247.1 km. The road distance is 294 km.
Great Western Railway (GWR) operates a train from Swansea to Reading hourly. Tickets cost £65–130 and the journey takes 2h 49m.