How much does a cheap train ticket from Cardiff to London cost?

The average train ticket price from Cardiff to London is $125. The best way to find cheap train tickets from Cardiff 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 trip from Cardiff to London?

A train trip between Cardiff and London is around 1h 54m, although the fastest train will take about 1h 47m. This is the time it takes to travel the 212 km that separates the two cities.

How many daily trains are there between Cardiff and London?

The number of trains from Cardiff to London can differ depending on the day of the week. On average, there are 15. Some trains are direct while others include transferring trains. Simplify your train trip from Cardiff to London by comparing and selecting the train that fits your travel style and budget on Busbud.

Which train companies travel from Cardiff to London?

When taking the train from Cardiff to London, you can travel comfortably and safely with Great Western Railway.

Train Cardiff to London from $65

Next train departures

Next departures for Cardiff to London on November 19
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	1:50pm	Cardiff Central	1h 53m	3:43pm	London Paddington	Cheapest
Train	3:54pm	Cardiff Central	1h 48m	5:42pm	London Paddington	Fastest
Train	1:18pm	Cardiff Central	1h 54m	3:12pm	London Paddington	No tags
Train	1:18pm	Cardiff Central	1h 54m	3:12pm	London Paddington	No tags
Train	1:50pm	Cardiff Central	1h 53m	3:43pm	London Paddington	No tags

Next departures for Cardiff to London on November 20
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	5:50pm	Cardiff Central	1h 54m	7:44pm	London Paddington	Cheapest
Train	3:54pm	Cardiff Central	1h 48m	5:42pm	London Paddington	Fastest
Train	7:23am	Cardiff Central	1h 49m	9:12am	London Paddington	No tags
Train	7:23am	Cardiff Central	1h 49m	9:12am	London Paddington	No tags
Train	7:49am	Cardiff Central	1h 55m	9:44am	London Paddington	No tags

Next departures for Cardiff to London on November 21
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	9:49am	Cardiff Central	1h 57m	11:46am	London Paddington	Cheapest
Train	3:54pm	Cardiff Central	1h 48m	5:42pm	London Paddington	Fastest
Train	7:23am	Cardiff Central	1h 49m	9:12am	London Paddington	No tags
Train	7:23am	Cardiff Central	1h 49m	9:12am	London Paddington	No tags
Train	7:49am	Cardiff Central	1h 55m	9:44am	London Paddington	No tags

Next departures for Cardiff to London on November 22
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	7:18am	Cardiff Central	1h 56m	9:14am	London Paddington	Cheapest
Train	8:23am	Cardiff Central	1h 50m	10:13am	London Paddington	Fastest
Train	7:18am	Cardiff Central	1h 56m	9:14am	London Paddington	No tags
Train	7:50am	Cardiff Central	1h 54m	9:44am	London Paddington	No tags
Train	7:50am	Cardiff Central	1h 54m	9:44am	London Paddington	No tags

Next departures for Cardiff to London on November 23
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	9:00am	Cardiff Central	1h 50m	10:50am	London Paddington	Cheapest
Train	11:20am	Cardiff Central	1h 49m	1:09pm	London Paddington	Fastest
Train	9:00am	Cardiff Central	1h 50m	10:50am	London Paddington	No tags
Train	9:35am	Cardiff Central	2h 11m	11:46am	London Paddington	No tags
Train	9:35am	Cardiff Central	2h 11m	11:46am	London Paddington	No tags

Next departures for Cardiff to London on November 24
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	5:50pm	Cardiff Central	1h 54m	7:44pm	London Paddington	Cheapest
Train	3:54pm	Cardiff Central	1h 48m	5:42pm	London Paddington	Fastest
Train	7:23am	Cardiff Central	1h 49m	9:12am	London Paddington	No tags
Train	7:23am	Cardiff Central	1h 49m	9:12am	London Paddington	No tags
Train	7:49am	Cardiff Central	1h 55m	9:44am	London Paddington	No tags

Next departures for Cardiff to London on November 25
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	5:50pm	Cardiff Central	1h 54m	7:44pm	London Paddington	Cheapest
Train	3:54pm	Cardiff Central	1h 48m	5:42pm	London Paddington	Fastest
Train	7:23am	Cardiff Central	1h 49m	9:12am	London Paddington	No tags
Train	7:23am	Cardiff Central	1h 49m	9:12am	London Paddington	No tags
Train	7:49am	Cardiff Central	1h 55m	9:44am	London Paddington	No tags

Next departures for Cardiff to London on November 26
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	5:50pm	Cardiff Central	1h 54m	7:44pm	London Paddington	Cheapest
Train	3:54pm	Cardiff Central	1h 48m	5:42pm	London Paddington	Fastest
Train	7:23am	Cardiff Central	1h 49m	9:12am	London Paddington	No tags
Train	7:23am	Cardiff Central	1h 49m	9:12am	London Paddington	No tags
Train	7:49am	Cardiff Central	1h 55m	9:44am	London Paddington	No tags

Last refresh of the prices: Today at 11:21 AM GMT.

Compare 3 ways to go from Cardiff to London

We recommend carpooling

Among the sustainable travel choices, the carpool stands out as a good way to reach London. The journey takes about 2 hours 50 minutes, and with fares starting at just $12, it presents an excellent value for a comfortable ride.

1carpool per day

2h 50mAverage Duration

212 kmDistance

9kgCO₂ emissions

	Average Price	Average Duration	CO₂ emissions
Bus	Average Price$16 - $136	Average Duration3h 42m	CO₂ emissions 5kg CO₂e
Train	Average Price$68 - $449	Average Duration1h 54m	CO₂ emissions 5kg CO₂e
Carpool	Average Price$12 - $51	Average Duration2h 50m	CO₂ emissions 9kg CO₂e

Train companies

Great Western Railway

4/542 reviews

Staff5

Timeliness4.7

Cleanliness4.7

Wifi4

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 $68

GB train and bus companies:Amtrak, Trenitalia, Renfe, VIA Rail Canada, RegioJet, FlixTrain, CrossCountry

Where are the popular train stations and stops in Cardiff and London?

Stops in Cardiff

A - Cardiff Central

Stops in London

A - King's Cross

B - St Pancras International

C - Euston Station

D - Waterloo

E - London Bridge

F - Marylebone

Frequently asked questions about travelling from Cardiff to London by train

How much does a cheap train ticket from Cardiff to London cost?
The average train ticket price from Cardiff to London is $125. The best way to find cheap train tickets from Cardiff 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 trip from Cardiff to London?
A train trip between Cardiff and London is around 1h 54m, although the fastest train will take about 1h 47m. This is the time it takes to travel the 212 km that separates the two cities.
How many daily trains are there between Cardiff and London?
The number of trains from Cardiff to London can differ depending on the day of the week. On average, there are 15. Some trains are direct while others include transferring trains. Simplify your train trip from Cardiff to London by comparing and selecting the train that fits your travel style and budget on Busbud.
Which train companies travel from Cardiff to London?
When taking the train from Cardiff to London, you can travel comfortably and safely with Great Western Railway.

Find cheapest prices for trains

Price is for a one-way ticket for one passenger and based on past searches.

Best price found

11-17

$103

11-18

$103

Today

$104

11-20

$104

11-21

$111

11-22

$111

11-23

$120

11-24

$104

The cheapest trip from Cardiff to London was searched and found on Nov 18, 2025 with a price of $103

To save money and be sure you have the best seat, it's a good idea to buy your train tickets from Cardiff to London, as early as possible.

You can expect to pay from $103 to $422 for a train ticket from Cardiff to London based on the last 2 days. You can expect to find the cheapest price for the trip at $104 which is on 2025-11-20.