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Journey from Cardiff Bay to London St Pancras International on the fastest train in 2h 43m, usually 2h 49m. Every day, 28 trains leave from Cardiff Bay, starting at 06:56 and ending at 23:54. During Off-Peak Times from 09:30 on weekdays, enjoy a quieter and less crowded journey. Get real-time updates on train schedules, delays, and cancellations. Save time, effort, and money with us.
| Departs | Arrives | Operator | ||
|---|---|---|---|---|
18:56 Cardiff Bay | 2h 49m, 2 change | 21:45 London St Pancras International | Transport for Wales | Find tickets |
19:56 Cardiff Bay | 2h 48m, 2 change | 22:44 London St Pancras International | Transport for Wales | Find tickets |
20:56 Cardiff Bay | 2h 50m, 2 change | 23:46 London St Pancras International | Transport for Wales | Find tickets |
22:39 Cardiff Bay | 8h 25m, 3 change | 07:04 London St Pancras International | Transport for Wales | Find tickets |
23:54 Cardiff Bay | 7h 52m, 1 change | 07:46 London St Pancras International | Transport for Wales | Find tickets |
Travelling by train from Cardiff Bay to London St Pancras International is efficient and offers a scenic and comfortable experience. With frequent departures from Cardiff Bay, you can reach London St Pancras International in just 2h 43m, making it one of the fastest and most convenient ways to travel between these two places.

The fastest train journey time from Cardiff Bay to London St Pancras International is 2h 43m . Use our Train Journey Planner to find direct trains, avoid transfers, and compare travel times for each route to see if there are fewer stops to make your journey seamless.
No, you will need to transfer when travelling from Cardiff Bay to London St Pancras International. TrainPal Train Journey Planner will assist you in finding the best train route. Enter the origin or destination places and other relevant details, then click "Search" to find the most suitable route.

While Cardiff Bay to London St Pancras International trains are usually on time, delays or disruptions may occur due to weather, strikes, and other factors. Finding a train timetable for your trip from Cardiff Bay to London St Pancras International is easy with Train Journey Planner. Simply enter your departure and arrival stations to get a detailed schedule of available trains. Input your travel details to discover the best routes, connections, and train times.
It’s recommended to reach the train station 15-20 minutes before your train is set to leave. This gives you sufficient time to locate your platform, particularly in larger stations. Arriving early is also beneficial if you need to collect tickets or find your way around an unfamiliar station, helping to minimise any potential stress.
Yes, most trains on the route from Cardiff Bay to London St Pancras International are equipped with Wi-Fi. Passengers can also enjoy complimentary food, drinks, and power sockets for a more comfortable journey. Please note that the availability of these services can vary depending on the train company
Check our Train Journey Planner, which provides detailed information about transfers to ensure your journey is uninterrupted, saving you time and effort, and allowing you to get a full rest for travelling.

Checking train delays and cancellations in the UK is simple. Utilise the TrainPal mobile app for real-time information. We offer live updates, including live train status and notifications of any train strikes.
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Trainpal makes travel easy by helping with changes, refunds, and Delay Repay requests.


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