Trains from Carmarthen to London from $44.41*

Arriving in London

With a journey time as short as 3h 37m, you can reach London from Carmarthen, with an average of 24 train per day.

Book cheap train tickets from Carmarthen to London

It doesn’t need to be difficult to find cheap train tickets from Carmarthen to London. If you know where to look and how to take advantage of available discounts and travel options, then saving money with Trip.com becomes second nature. Here are some of our top tips to help you save money on your train travel.

Network Railcard for South East England

For only a small annual fee, you can save 1/3 on most fares in South East England, including routes in and out of London, with the Network Railcard. Covering both standard and off-peak tickets, this railcard is particularly beneficial for those who travel regularly within this region.

Get 1/3 off with a Railcard

With a Railcard, you can save up to 1/3 on most rail fares. There are different types of Railcards available, such as the 16–25 Railcard, the Family & Friends Railcard, and the Senior Railcard, each designed to cater to specific groups of travelers. You can discover more about Railcards here.

Book in advance to save an average of 61%

Did you know that purchasing Advance Tickets can significantly reduce your travel expenses? On average, these tickets can save you an impressive 61% on fares. The best part is that the earlier you book them, the greater the savings. It's recommended to secure your Advance Tickets as soon as possible, ideally up to 12 weeks in advance. By doing so, you'll not only enjoy substantial discounts but also have peace of mind knowing that you've secured the most affordable option for your journey from Carmarthen to London.