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Cardiff to London Train

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10/05/2026
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Cardiff to London by train

The journey from Cardiff to London by train is 133 mi and takes 2 hrs 29 mins. There are 30 connections per day, with the first departure at 04:25 and the last at 21:30. It is possible to travel from Cardiff to London by train for as little as £31.80 or as much as £149.99. The best price for this journey is £31.80.

Lowest Price £31.80
Journey Duration 2 hrs 29 mins
Connection per Day 30
Lowest Price £31.80
Highest Price £149.99
First Departure 04:25
Last Departure 21:30
Distance 133 mi
Departure Cardiff
Arrival London
Carriers Transport for Wales, Great Western Railway

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Price as departure date approaches

Train companies may charge higher ticket prices as the date of departure approaches. Prices in the next days can range from around £34.04 to £54.93 but may be subject to change. Our advice is to book as early as possible to potentially save up to 38% on your trip!

Find the best day to travel to London by train

When travelling to London by train, if you want to avoid crowds you can check how frequently our customers are travelling in the next 30-days using the graph below. On average, the peak hours to travel are between 6:30am and 9am in the morning, or between 4pm and 7pm in the evening. Please keep this in mind when travelling to your point of departure as you may need some extra time to arrive, particularly in big cities!

Services on board Transport for Wales and Great Western Railway from Cardiff to London
Compare services on board when travelling from Cardiff to London by train.
Facilities Transport for Wales Great Western Railway
quiet_zone Quiet zone check check
wifi WiFi check check
power_sockets Power sockets check check
luggage Luggage check check
food_and_drink Food and drink check check

Cardiff to London CO2 Emissions by Train

Ecology
Train
14.98kg
Bus
16.05kg
Flight
42.81kg
Car
34.25kg
What are the CO2 emissions from Cardiff to London by train? The CO2 emissions from taking the train between Cardiff and London are 14.98kg.
How much CO2 do I save by taking the train between Cardiff and London? By taking the train between Cardiff and London you will save 27.83kg CO2 emissions compared to a flight, 1.07kg compared to a bus and 19.27kg compared to a car.

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Frequently Asked Questions

How much is a train ticket from Cardiff to London?
A train ticket from Cardiff to London is £56.97. However the price varies depending on how early you buy, and if it's peak time to travel. Occasionally you can find them for as cheap as £31.80.
What's the cheapest train ticket from Cardiff to London?
The cheapest ticket you can get from Cardiff to London is £31.80. We recommend booking as early as possible and off-peak hours to get the cheapest ticket possible. Off-peak times are usually from 09:30 to 16:00, and after 19:00.
What's the distance between Cardiff and London by train?
Cardiff to London is 133 mi.
How long does the train between Cardiff and London take?
Cardiff to London is on average 2 hrs 29 mins. However the fastest option will get you there in 1 hr 49 mins.
Which companies operate from Cardiff to London?
The train journey from Cardiff to London is covered by 2 operator(s). On Virail you can find these carriers that provide services on this route: Transport for Wales, Great Western Railway and CrossCountry.
How many train connections per day go from Cardiff to London?
Cardiff to London has 30 connection(s) per day on average.
What time does the first train from Cardiff to London leave?
The earliest train from Cardiff to London departs at 04:25. However be sure to check with us the schedule on the day you want to leave as the time may differ.
What time does the last train from Cardiff to London depart?
The latest train from Cardiff to London departs at 21:30. However be sure to check with us the schedule on the day you want to leave as the time may differ.
Should I book my ticket from Cardiff to London in advance?
If you can, we recommend booking your ticket as early as possible to ensure you get better savings. The cheapest train ticket we have found is £31.80 but this may be subject to change depending on the day of travel, hour you wish to depart and how far in advance you book.
How many direct connections depart from Cardiff to London?
There are on average 20 direct connection(s) from Cardiff to go to London.
What's the fastest journey time between Cardiff to London by train?
The fastest journey time by train between Cardiff and London is 1 hr 49 mins.
Is there a direct train from Cardiff to London?
Yes, there is a direct train between Cardiff and London.
What are the CO2 emissions for Cardiff to London by train?
The train journey from Cardiff to London creates 14.98kg of CO2 emissions.

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