Next departures for Carmarthen to London on November 20
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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: Last Saturday at 12:12 PM GMT.
Compare 3 ways to go from Carmarthen to London
We recommend taking the train
Among the sustainable travel choices, the train stands out as the good way to reach London. The journey takes about 3 hours 51 minutes and with fares starting at just $53, it presents an excellent value for a comfortable ride.
Based on 42 reviews, the company was rated 4 stars on Busbud. Travelers 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 $53
Frequently asked questions about traveling from Carmarthen to London by train
How much does a train ticket from Carmarthen to London cost?
The average train ticket price from Carmarthen to London is $94. The best way to find train tickets from Carmarthen to London 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 train trip from Carmarthen to London?
A train trip between Carmarthen and London is around 3h 51m, although the fastest train will take about 3h 39m. This is the time it takes to travel the 181 miles that separates the two cities.
How many daily trains are there between Carmarthen and London?
The number of trains from Carmarthen to London can differ depending on the day of the week. On average, there are 4. Some trains are direct while others have layovers. Simplify your train trip from Carmarthen to London by comparing and selecting the train that fits your travel style and budget on Busbud.
Which train companies travel from Carmarthen to London?
When taking the train from Carmarthen to London, you can travel comfortably and safely with Great Western Railway.
What are the best sights and things to do in London?
Once in London, you can explore the city. The top sights and things to do are Madame Tussauds London, Kew Gardens, London Mithraeum, The British Museum, St Paul's Cathedral.
Find cheapest prices for trains
Price is for a one-way ticket for one passenger and based on past searches.
Best price found
11/16
$89
11/17
$51
Today
$78
11/19
$51
11/20
$78
11/21
$84
11/22
$84
11/23
No data
The cheapest trip from Carmarthen to London was searched and found on Nov 17, 2025 with a price of $51
To 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 $51 to $153 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 $51 which is on 2025-11-19.
The cheapest trip from Carmarthen to London was searched and found on Nov 17, 2025 with a price of $51
