Next departures
| Operated by | Vehicle type | Departure time | Departure location | Trip duration | Arrival time | Arrival location | Recommended | Price and booking link |
|---|---|---|---|---|---|---|---|---|
 | Portsmouth and Southsea | Cardiff Central | Cheapest | |||||
| Portsmouth and Southsea | Cardiff Central | Fastest | |||||
| Portsmouth and Southsea | Cardiff Central | No tags | |||||
| Portsmouth and Southsea | Cardiff Central | No tags | |||||
| Portsmouth Harbour | Cardiff Central | No tags |
Last refresh of the prices: Yesterday at 4:17 AM GMT.
Accepted payments
Compare 3 ways to travel from Portsmouth to Cardiff
Among the sustainable travel choices, the carpool stands out as a good way to reach Cardiff. The journey takes about 3 hours 40 minutes and with fares starting at just US$18, it presents an excellent value for a comfortable ride.
Train Portsmouth to Cardiff: 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$87
Portsmouth to Cardiff Train
With Busbud, comparing and booking tickets for a train from Portsmouth to Cardiff is a breeze. Browse through an extensive selection of train fares and train schedules to find the best deals.
We make sure you can find a train service from Portsmouth to Cardiff from the most reliable train companies operating this trip.
From train tickets to high-end trains trip from Portsmouth to Cardiff, we offer a wide range of train services to best suit your needs depending on how much your budget is.
Frequently asked questions on the trip Portsmouth - Cardiff
How much does a cheap train ticket from Portsmouth to Cardiff cost?
The average train ticket price from Portsmouth to Cardiff is US$107. The best way to find cheap train tickets from Portsmouth to Cardiff 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 Portsmouth to Cardiff?
A train trip between Portsmouth and Cardiff is around 3h 22m, 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 Portsmouth and Cardiff?
The number of trains from Portsmouth to Cardiff can differ depending on the day of the week. On average, there are 6. Some trains are direct while others include transferring trains. Simplify your train trip from Portsmouth to Cardiff by comparing and selecting the train that fits your travel style and budget on Busbud.
Which train companies travel from Portsmouth to Cardiff?
When taking the train from Portsmouth to Cardiff, 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 Portsmouth to Cardiff was searched and found on 06 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 Portsmouth to Cardiff as early as possible.
You can expect to pay from US$75 to US$103 for a train ticket from Portsmouth to Cardiff based on the last 2 days. You can expect to find the cheapest price for the trip at US$75, which is on 2025-11-06.
About Train Travel
Train Travel Tips
Taking the fastest trains allows you to travel at speeds greater than 300 km/h. Taking a trip from Portsmouth to Cardiff is not only much quicker but more comfortable too! You can usually travel directly to the city centre and save time while you're at it.
Regional train? High-speed train? Whichever train to Cardiff 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.
The train emits up to 30x less CO2 for a trip between Portsmouth and Cardiff compared to the same trip made by plane or car. A truly ecological mode of transport that will allow you to easily reduce your carbon footprint.
Create your own real-life musical score by curating a personalised train travel playlist – the perfect accompaniment for your journey from Portsmouth to Cardiff.
Did you know?
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!
The longest train journey in the world is between Europe and Asia. This long journey starts from Porto in Portugal and crosses the whole European continent to reach Hanoi in Vietnam in 12 days while travelling more than 17,000 km.
New York holds the record for the most platforms and track numbers in a single station. Grand Central Station in Manhattan is one of the largest rail terminals in the world with more than 44 platforms and 67 tracks to accommodate passengers.
Top Travelled Train Routes
Why choose Busbud?
The Best Way To Book Bus and Train Tickets
Busbud helps you easily search, compare and book intercity bus tickets on a worlwide scale with our comprehensive list of bus routes and schedules. Use Busbud to book your trip online, in your own language and currency, wherever you are. Busbud partners with safe and reliable bus companies throughout the world such as Greyhound, Eurolines, ALSA, OUIBUS (BlaBlaBus), National Express and many others so you can buy tickets without a worry.
People from around the world trust Busbud
Popular Trains Connecting Portsmouth
Trains Leaving from Portsmouth
Popular Trains Connecting Cardiff
Trains Going to Cardiff
Popular train trips
Top Routes Worldwide
- Train from Lyon to Marseille
- Train from Burnley to Liverpool
- Train from Como to Genoa
- Train from Marseille to Lille
- Train from Liverpool to Burnley
- Train from Lille to Marseille
- Train from Strasbourg to Marseille
- Train from Manchester to Salford
- Train from Marseille to Rennes
- Train from Manchester to Oldham
- Train from Marseille to Montpellier
- Train from Marseille to Toulouse
- Train from Leverkusen to Freiburg
- Train from Salford to Manchester
- Train from Parma to Verona