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

The cheapest train tickets from Cardiff to London start from £37. The average price for this train route is around £67. Busbud recommends booking your tickets in advance for the best chance of getting the lowest possible price.

How long is the train journey from Cardiff to London?

The average train journey time from Cardiff to London is 1h 54m, covering a distance of 129 miles. The fastest train gets you there in 1h 47m and is operated by Great Western Railway .

Which train operators serve the Cardiff to London route?

Several major train operators run on this route with 16 trains available per day.

What are the earliest and latest departure times for the train from Cardiff to London?

The earliest train from Cardiff to London departs at 07:18. And the latest train departs at 21:30.

Train Cardiff to London from £36

Next train departures

Next departures from Cardiff to London on 12 December
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	09:19	Cardiff Central	2h 1m	11:20	London Paddington	Cheapest
Train	15:54	Cardiff Central	1h 48m	17:42	London Paddington	Fastest
Train	07:23	Cardiff Central	1h 49m	09:12	London Paddington	No tags
Train	07:23	Cardiff Central	1h 49m	09:12	London Paddington	No tags
Train	07:49	Cardiff Central	1h 55m	09:44	London Paddington	No tags

Next departures from Cardiff to London on 13 December
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	07:18	Cardiff Central	1h 56m	09:14	London Paddington	Cheapest
Train	08:23	Cardiff Central	1h 50m	10:13	London Paddington	Fastest
Train	07:18	Cardiff Central	1h 56m	09:14	London Paddington	No tags
Train	07:50	Cardiff Central	1h 54m	09:44	London Paddington	No tags
Train	07:50	Cardiff Central	1h 54m	09:44	London Paddington	No tags

Next departures from Cardiff to London on 14 December
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	08:50	Cardiff Central	2h	10:50	London Paddington	Cheapest
Train	11:20	Cardiff Central	1h 49m	13:09	London Paddington	Fastest
Train	08:50	Cardiff Central	2h	10:50	London Paddington	No tags
Train	09:35	Cardiff Central	2h 6m	11:41	London Paddington	No tags
Train	09:35	Cardiff Central	2h 6m	11:41	London Paddington	No tags

Next departures from Cardiff to London on 15 December
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	17:50	Cardiff Central	1h 52m	19:42	London Paddington	Cheapest
Train	07:23	Cardiff Central	1h 49m	09:12	London Paddington	Fastest
Train	07:23	Cardiff Central	1h 49m	09:12	London Paddington	No tags
Train	07:49	Cardiff Central	1h 55m	09:44	London Paddington	No tags
Train	07:49	Cardiff Central	1h 55m	09:44	London Paddington	No tags

Next departures from Cardiff to London on 16 December
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	17:50	Cardiff Central	1h 52m	19:42	London Paddington	Cheapest
Train	07:23	Cardiff Central	1h 49m	09:12	London Paddington	Fastest
Train	07:23	Cardiff Central	1h 49m	09:12	London Paddington	No tags
Train	07:49	Cardiff Central	1h 55m	09:44	London Paddington	No tags
Train	07:49	Cardiff Central	1h 55m	09:44	London Paddington	No tags

Next departures from Cardiff to London on 17 December
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	17:50	Cardiff Central	1h 52m	19:42	London Paddington	Cheapest
Train	07:23	Cardiff Central	1h 49m	09:12	London Paddington	Fastest
Train	07:23	Cardiff Central	1h 49m	09:12	London Paddington	No tags
Train	07:49	Cardiff Central	1h 55m	09:44	London Paddington	No tags
Train	07:49	Cardiff Central	1h 55m	09:44	London Paddington	No tags

Next departures from Cardiff to London on 18 December
Vehicle type	Departure time	Departure location	Trip duration	Arrival time	Arrival location	Recommended
Train	17:50	Cardiff Central	1h 52m	19:42	London Paddington	Cheapest
Train	07:23	Cardiff Central	1h 49m	09:12	London Paddington	Fastest
Train	07:23	Cardiff Central	1h 49m	09:12	London Paddington	No tags
Train	07:49	Cardiff Central	1h 55m	09:44	London Paddington	No tags
Train	07:49	Cardiff Central	1h 55m	09:44	London Paddington	No tags

Last refresh of the prices: Today at 20:22 GMT.

Compare 3 ways to travel 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 £9, it presents an excellent value for a comfortable ride.

1carpool per day

2h 50mAverage duration

131 milesDistance

9kgCO₂ emissions

	Average price	Average duration	CO₂ emissions
Bus	Average price£9 - £74	Average duration3h 40m	CO₂ emissions 5kg CO₂e
Train	Average price£37 - £238	Average duration1h 54m	CO₂ emissions 5kg CO₂e
Carpool	Average price£9 - £27	Average duration2h 50m	CO₂ emissions 9kg CO₂e

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

Cardiff

A
Cardiff Central
Cardiff Central, UK
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London

A
King's Cross
7 York Way, London N1 9AA, UK
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B
St Pancras International
King's Cross St. Pancras, Euston Rd, Kings Cross, London N1 9AL, UK
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C
Euston Station
Euston Railway Station B40 The Balcony, Eversholt St, London NW1 2DU, UK
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D
Waterloo
Waterloo Station Southbank, Station Approach, London SE1 8SW, UK
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E
London Bridge
51-55 St Thomas St, London SE1 3QX, UK
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F
Marylebone
Melcombe Pl, London NW1 6JJ, UK
Visit page

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 Wi-Fi. Great Western Railway ticket prices on this trip start at £37

GB train companies: Amtrak, Trenitalia, Renfe, VIA Rail Canada, RegioJet, FlixTrain, Amtrak Acela

Frequently asked questions about travelling from Cardiff to London by train

Please note that timetables, routes, or operator details shown here may be updated or vary at the time of your journey.

How much does a train ticket cost from Cardiff to London?
The cheapest train tickets from Cardiff to London start from £37. The average price for this train route is around £67. Busbud recommends booking your tickets in advance for the best chance of getting the lowest possible price.
How long is the train journey from Cardiff to London?
The average train journey time from Cardiff to London is 1h 54m, covering a distance of 129 miles. The fastest train gets you there in 1h 47m and is operated by Great Western Railway.
Which train operators serve the Cardiff to London route?
Several major train operators run on this route with 16 trains available per day.
What are the earliest and latest departure times for the train from Cardiff to London?
The earliest train from Cardiff to London departs at 07:18. And the latest train departs at 21:30.

Find cheapest prices for trains

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

Best price found

09/12

£60

10/12

£60

Today

£61

12/12

£65

13/12

£65

14/12

£65

15/12

£61

16/12

£61

The cheapest trip from Cardiff to London was searched and found on 10 Dec 2025 with a price of £60

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 £60 to £231 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 £61, which is on 2025-12-15.