Previously seen journeys
| Operated by | Vehicle type | Departure time | Departure location | Trip duration | Arrival time | Arrival location | Recommended | Price and booking link |
|---|---|---|---|---|---|---|---|---|
 | Cardiff Central | Portsmouth and Southsea | No tags | |||||
| Cardiff Central | Portsmouth and Southsea | No tags | |||||
| Cardiff Central | Portsmouth and Southsea | No tags | |||||
| Cardiff Central | Portsmouth and Southsea | No tags | |||||
| Cardiff Central | Portsmouth and Southsea | No tags |
Accepted payments
Compare 3 ways to travel from Cardiff to Portsmouth
Among the sustainable travel choices, the carpool stands out as a good way to reach Portsmouth. The journey takes about 3 hours and with fares starting at just US$32, it presents an excellent value for a comfortable ride.
Train Cardiff to Portsmouth: Trip Overview
Please note, this information is subject to change.
Train Companies
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 US$77
Cardiff to Portsmouth Train
Busbud helps you find a train from Cardiff to Portsmouth. Get the best fare and schedule, book a round trip ticket or find trains with WiFi and electrical outlets.
We make sure you can find a train service from Cardiff to Portsmouth from the most reliable train companies operating this trip.
Discover how much the train trip from Cardiff to Portsmouth will cost you. Use our filters and sorting features to find the cheapest train tickets or high-end trains.
Frequently asked questions on the trip Cardiff - Portsmouth
How much does a cheap train ticket from Cardiff to Portsmouth cost?
The average train ticket price from Cardiff to Portsmouth is US$107. The best way to find cheap train tickets from Cardiff to Portsmouth 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 train trip from Cardiff to Portsmouth?
A train trip between Cardiff and Portsmouth is around 3h 19m, although the fastest train will take about 3h 15m. This is the time it takes to travel the 165 km that separates the two cities.
How many daily train are there between Cardiff and Portsmouth?
The number of trains from Cardiff to Portsmouth can differ depending on the day of the week. On average, there are 10. Some trains are direct while others include transferring trains. Simplify your train trip from Cardiff to Portsmouth by comparing and selecting the train that fits your travel style and budget on Busbud.
Which train companies travel from Cardiff to Portsmouth?
When taking the train from Cardiff to Portsmouth, 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.
The cheapest trip from Cardiff to Portsmouth was searched and found on 03 Nov 2025 with a price of US$75To save money and be sure you have the best seat, it's a good idea to buy your train tickets from Cardiff to Portsmouth as early as possible.
You can expect to pay from US$75 to US$103 for a train ticket from Cardiff to Portsmouth based on the last 2 days. You can expect to find the cheapest price for the trip at US$75, which is on 2025-11-03.
About Train Travel
Train Travel Tips
There are many train stations in the world, explore station pages on Busbud to get all information you need.
Regional train? High-speed train? Whichever train to Portsmouth you take, you’ll help reduce the environmental impact and carbon footprint of your trip. As you watch the landscapes unfold before your eyes, you can tell yourself that with this choice, you are making sure they remain protected.
With up to 30x less CO2 emissions for your train journey between Cardiff and Portsmouth, the train is an ecological alternative to flights or personal cars.
Tune out to the fine sounds of your best music playlist on your train trip from Cardiff to Portsmouth while indulging in miles on end of beautiful scenic views.
Did you know?
The magnetic levitation train (Maglev for short) is currently the fastest train in the world. With a speed of 603 km/ h, it is closely followed by the French high-speed train (574.8 km / h) which remains in 2020, the fastest train to date
One of the deepest train stations in the world is in Kiev. Located at a depth of 105m, it was designed in this way to serve as a shelter in the event of an attack. The second deepest station is in China. Badaling station is located 60m under the Great Wall of China!
Japanese trains are always on time. It is extremely infrequent to see breakdowns during peak periods. In the event of a delay of more than 5 minutes, the crew will personally apologise to each passenger.
Top Travelled Train Routes
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