The average train between St Pancras International Station and Llanelli takes 3h 39m and the fastest train takes 3h 19m. There is a train service every few hours from St Pancras International Station 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 St Pancras International Station and Llanelli. The earliest departure is at 6:32 AM in the morning, and the last departure from St Pancras International Station is at 10:35 PM which arrives into Llanelli at 5:31 AM. All services require a transfer at Paddington and take an average of 3h 39m. The schedules shown below are for the next available departures.


3h 28m • 2 changes


3h 29m • 2 changes


3h 32m • 2 changes


3h 27m • 2 changes


3h 28m • 2 changes


3h 29m • 2 changes


3h 32m • 2 changes


3h 27m • 2 changes


3h 28m • 2 changes


3h 29m • 2 changes


3h 32m • 2 changes


3h 27m • 2 changes
Want to know about travelling from St Pancras International Station 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 St Pancras International Station to Llanelli. However, there are services departing from St Pancras International Station station and arriving at Llanelli station via Swansea. The journey, including transfers, takes approximately 3h 39m.
St Pancras International Station to Llanelli train services, operated by London Underground (Tube), depart from London Paddington station.
St Pancras International Station to Llanelli train services, operated by London Underground (Tube), arrive at Swansea station.
Book your St Pancras International Station to Llanelli train tickets online with London Underground (Tube), Great Western Railway (GWR) and Transport for Wales.
The distance between St Pancras International Station and Llanelli is 279.3 km. The road distance is 327 km.
Great Western Railway (GWR) operates a train from London Paddington to Swansea hourly. Tickets cost £85–160 and the journey takes 2h 52m.