Trains leaving Wednesday
One passenger / one way
- This trip is recommended because it is the: CheapestDeparture time: May 7 atDeparture city: LondonDeparture location: London PaddingtonArrival time: May 7 atDestination city: CarmarthenDestination location: CarmarthenOperated by: Great Western Railway
Vehicle: TrainDuration: - This trip is recommended because it is the: FastestDeparture time: May 7 atDeparture city: LondonDeparture location: London PaddingtonArrival time: May 7 atDestination city: CarmarthenDestination location: CarmarthenOperated by: Great Western RailwayVehicle: TrainDuration:
- Departure time: May 7 atDeparture city: LondonDeparture location: London PaddingtonArrival time: May 7 atDestination city: CarmarthenDestination location: CarmarthenOperated by: Great Western RailwayVehicle: TrainDuration:
- Departure time: May 7 atDeparture city: LondonDeparture location: London PaddingtonArrival time: May 7 atDestination city: CarmarthenDestination location: CarmarthenOperated by: Great Western RailwayVehicle: TrainDuration:
- Departure time: May 7 atDeparture city: LondonDeparture location: London PaddingtonArrival time: May 7 atDestination city: CarmarthenDestination location: CarmarthenOperated by: Great Western RailwayVehicle: TrainDuration:
Last refresh of the prices: Today at 10:39 AM BST.
Prices and availability are subject to change.
Accepted payments
Compare 3 ways to go from London to Carmarthen
| Average Price | Average Duration | CO₂ emissions | |||
|---|---|---|---|---|---|
| Average PriceUS$20 - US$47 | Average Duration5h 45m | 7kg CO₂e5 out of 5 stars | CheapestMost eco-friendly | ||
| Average PriceUS$54 - US$284 | Average Duration3h 40m | 7kg CO₂e5 out of 5 stars | Fastest | ||
Carpool | Average PriceUS$28 - US$28 | Average Duration4h 20m | 12kg CO₂e4 out of 5 stars |
Busbud recommends taking the train from London to CarmarthenAmong the sustainable travel choices, the train stands out as a good way to reach Carmarthen. The journey takes about 3 hours 40 minutes, and with fares starting at just US$54, it presents an excellent value for a comfortable ride.
Train London to Carmarthen: Trip Overview
Please note, this information is subject to change
Train companies
Based on 41 reviews, the company was rated 3.9 stars on Busbud. Travellers were especially satisfied with the staff and the seats but often complained with the value for money. Great Western Railway ticket prices on this trip start at US$54.00
London to Carmarthen Train
With Busbud, comparing and booking tickets for a train from London to Carmarthen is a breeze. Browse through an extensive selection of train fares and train schedules to find the best deals.
Train service from London to Carmarthen will be provided by the most trusted companies.
Whether it is train tickets or first class train tickets going to Carmarthen from London, we help you find what you're looking for based on how much of a budget you have.
Frequently asked questions on the trip London - Carmarthen
How much does a cheap train ticket from London to Carmarthen cost?
The average train ticket price from London to Carmarthen is US$119. The best way to find cheap train tickets from London to Carmarthen is to book your tickets as early as possible. Prices tend to rise as your travel date approaches, so book in advance to secure the best prices!
How long is the trip from London to Carmarthen?
A train trip between London and Carmarthen is around 3h 40m, although the fastest train will take about 3h 36m. This is the time it takes to travel the 292 km that separates the two cities.
How many daily trains are there between London and Carmarthen?
The number of trains from London to Carmarthen can differ depending on the day of the week. On average, there are 3. Some trains are direct while others include transferring trains. Simplify your train trip from London to Carmarthen by comparing and selecting the train that fits your travel style and budget on Busbud.
Find cheapest prices for trains
Price is for a one-way ticket for one passenger and based on past searches.
The cheapest trip from London to Carmarthen was searched and found on May 2, 2025 with a price of US$60To save money and be sure you have the best seat, it's a good idea to buy your train tickets from London to Carmarthen, as early as possible.
You can expect to pay from US$60 to US$273 for a train ticket from London to Carmarthen based on the last 2 days. You can expect to find the cheapest price for the trip at US$94 which is on 2025-05-07.
About Train Travel
Train Travel Tips
Taking the fastest trains allows you to travel at speeds greater than 300 km/h. Taking a trip from London to Carmarthen is not only much quicker but more comfortable too! You can usually travel directly to the city centre and save time while you're at it.
No matter if you plan to take a regional or high-speed train to Carmarthen, the planet will thank you. You’ll help to protect the beautiful landscapes that will unfold before your very eyes.
By choosing the train between London and Carmarthen, you emit up to 30 times less CO2 than for the same journey made by plane or car!
Make a music playlist for your train ride from London to Carmarthen, and enjoy the scenery to tunes from your own personal soundtrack.
Did you know?
One of the deepest train stations in the world is in Kiev. Located at a depth of 105 m, it was designed in this way to serve as a shelter in the event of an attack. The second deepest station is in China. Badaling station is located 60 m under the Great Wall of China!
Some trains in Sweden can recover more than a fifth of the energy they use by braking. This is especially true with ore trains as they descend from Narvik to Kiruna.
The first high-speed train line was inaugurated in 1964, in Japan, to connect Tokyo with Osaka. It was during the Olympics that the first passengers travelled aboard the Shinkansen at a speed of 210 km / h.
Top Travelled Train Routes
Why choose Busbud?
The Best Way To Book Bus and Train Tickets
Busbud.com makes it easy for you to find, compare and book city-to-city bus tickets, all over the world. We save you the extra trip to the bus station. With several language and currency options available, Busbud seeks to cater to international bus travellers no matter where they are in the world. With Busbud, you can buy tickets with confidence. We ensure that you make the most out of your bus trip by partnering up with reliable bus companies from all around the world such as Greyhound, Eurolines, ALSA, OUIBUS (BlaBlaBus), National Express and many others.
People from around the world trust Busbud
Popular Trains Connecting London
Trains Leaving from London
Popular Trains Connecting Carmarthen
Trains Going to Carmarthen
Popular train trips
Top Routes Worldwide
- Train from Milan to Lecce
- Train from Lyon to Marseille
- Train from Dortmund to Leverkusen
- Train from Barcelona to Milan
- Train from Paris to Brest
- Train from Milan to Empoli
- Train from Marseille to Lille
- Train from Paris to Dortmund
- Train from Abano Terme to Padova
- Train from Verona to Milan
- Train from Metz to Saint-Étienne
- Train from Lecce to Parma
- Train from Manchester to Oldham
- Train from Rennes to Brest
- Train from Manchester to Altrincham