Next train departures
| Operated by | Vehicle type | Departure time | Departure location | Trip duration | Arrival time | Arrival location | Recommended | Price and booking link |
|---|---|---|---|---|---|---|---|---|
 | Train | Carmarthen | London Paddington | Cheapest | ||||
| Train | Carmarthen | London Paddington | Fastest | ||||
| Train | Carmarthen | London Paddington | No tags | ||||
| Train | Carmarthen | London Paddington | No tags | ||||
| Train | Carmarthen | London Paddington | No tags |
Last refresh of the prices: Yesterday at 19:30 GMT.
Compare 3 ways to travel from Carmarthen to London
Among the sustainable travel choices, the Train stands out as a good way to reach London. The journey takes about 3 hours 55 minutes and with fares starting at just €41, it presents an excellent value for a comfortable ride.
Train Companies
Based on 42 reviews, the company was rated 4 stars on Busbud. Travellers were especially satisfied with the staff and the seats but often complained with the Wi-Fi. Great Western Railway ticket prices on this trip start at €41
Frequently asked questions about travelling from Carmarthen to London by train
Please note that timetables, routes, or operator details shown here may be updated or vary at the time of your journey.
How much does a train ticket cost from Carmarthen to London?
The cheapest train tickets from Carmarthen to London start from €41. The average price for this train route is around €83. Busbud recommends booking your tickets in advance for the best chance of getting the lowest possible price.
How long is the train journey from Carmarthen to London?
The average train journey time from Carmarthen to London is 3h 55m, covering a distance of 288 km. The fastest train gets you there in 3h 42m and is operated by Great Western Railway.
Which train operators serve the Carmarthen to London route?
Several major train operators run on this route with 4 trains available per day.
What are the earliest and latest departure times for the train from Carmarthen to London?
The earliest train from Carmarthen to London departs at 07:18. And the latest train departs at 19:20.
Find cheapest prices for trains
Price is for a one-way ticket for one passenger and based on past searches.
The cheapest trip from Carmarthen to London was searched and found on 24 Jan 2026 with a price of €64To save money and be sure you have the best seat, it's a good idea to buy your train tickets from Carmarthen to London as early as possible.