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 | CheapestFastest | ||||
| Train | Carmarthen | London Paddington | No tags | ||||
| 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 1:49 AM GMT.
Compare 3 ways to go 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 50 minutes, and with fares starting at just $75, 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 WiFi. Great Western Railway ticket prices on this trip start at $75
Frequently asked questions about travelling from Carmarthen to London by train
Please note that schedules, routes, or operator details shown here may be updated or vary at the time of your trip.
How much is the train ticket from Carmarthen to London?
The cheapest train tickets from Carmarthen to London start at $75. The average price for this train route is around $132. Busbud recommends booking your tickets in advance to increase your chances of getting the lowest possible price.
How long is the train ride from Carmarthen to London?
The average train trip from Carmarthen to London takes 3h 50m and covers 288 km. The quickest train gets you there in 3h 39m and is operated by Great Western Railway.
Which train operators serve the Carmarthen to London route?
Several major train operators serve 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 7:18am. The latest train departs at 7:20pm.
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 Dec 16, 2025 with a price of $71To 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.
You can expect to pay from $71 to $222 for a train ticket from Carmarthen to London based on the last 2 days. You can expect to find the cheapest price for the trip at $71 which is on 2025-12-16.
