Next train departures
| Operated by | Vehicle type | Departure time | Departure location | Trip duration | Arrival time | Arrival location | Recommended | Price and booking link |
|---|---|---|---|---|---|---|---|---|
 | Train | Cardiff Central | Portsmouth and Southsea | CheapestFastest | ||||
| Train | Cardiff Central | Portsmouth and Southsea | No tags | ||||
| Train | Cardiff Central | Portsmouth and Southsea | No tags | ||||
| Train | Cardiff Central | Portsmouth and Southsea | No tags | ||||
| Train | Cardiff Central | Portsmouth and Southsea | No tags |
Last refresh of the prices: Yesterday at 1:56 AM GMT.
Compare 2 ways to go from Cardiff to Portsmouth
Among the sustainable travel choices, the Train stands out as the good way to reach Portsmouth. The journey takes about 3 hours 19 minutes and with fares starting at just $20, it presents an excellent value for a comfortable ride.
Train Companies
Based on 42 reviews, the company was rated 4 stars on Busbud. Travelers were especially satisfied with the staff and the seats but often complained with the wifi. Great Western Railway ticket prices on this trip start at $20
Frequently asked questions about traveling from Cardiff to Portsmouth by train
Please note that schedules, routes, or operator details shown here may be updated or vary at the time of your trip.
How much is the train ticket from Cardiff to Portsmouth?
The cheapest train tickets from Cardiff to Portsmouth start from $20. The average price for this train route is around $106. Busbud recommends that you book your tickets in advance for a better chance to get the lowest possible price.
How long is the train journey from Cardiff to Portsmouth?
The average train ride duration from Cardiff to Portsmouth is 3h 19m, covering a distance of 102 miles (165 km). The quickest train can get you there in 3h 15m and is operated by Great Western Railway.
Which train operators service the Cardiff to Portsmouth route?
Several major train operators operate on this route with 10 trains available per day.
What is the earliest and latest departure time for the train from Cardiff to Portsmouth?
The earliest train departs from Cardiff to Portsmouth at 7:27am. And the latest train departs at 8:30pm.
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 Jan 19, 2026 with a price of $19To 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 $19 to $101 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 $75 which is on 2026-01-24.
