The average train between Llanelli and London takes 3h 39m and the fastest train takes 3h 8m. There is a train service every few hours from Llanelli to London. 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 London. The earliest departure is at 5:03 AM in the morning, and the last departure from Llanelli is at 11:10 PM which arrives into London at 7:16 AM. All services require a transfer, and take on average 3h 39m. The schedules shown below are for the next available departures.

3h 9m • 1 change

3h 10m • 1 change

3h 15m • 1 change

3h 13m • 1 change

3h 13m • 1 change

3h 9m • 1 change

3h 19m • 1 change

3h 17m • 1 change

3h 13m • 1 change

3h 9m • 1 change

3h 19m • 1 change

3h 17m • 1 change
Want to know about travelling from Llanelli to London? 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 London. However, there are services departing from Llanelli station and arriving at London station via London Paddington. The journey, including transfers, takes approximately 3h 39m.
Llanelli to London train services, operated by Transport for Wales, depart from Swansea station.
Llanelli to London train services, operated by Transport for Wales, arrive at London Paddington station.
Book your Llanelli to London train tickets online with Transport for Wales and Great Western Railway (GWR).
The distance between Llanelli and London is 279.4 km. The road distance is 323 km.
Great Western Railway (GWR) operates a train from Swansea to London Paddington hourly. Tickets cost £85–160 and the journey takes 2h 53m.