How long does it take to get to Portsmouth?

By train, it takes about 5 hours; by car, about 4.25 hours.

Is there a direct train?

No, you will need to change trains at least once.

What is the best way to travel?

Train is recommended for comfort, while driving is better for flexibility.

No, the route via the M25 is toll-free.

Can I take a bike on the train?

Yes, but you must reserve a space in advance.

Kidwelly

Portsmouth

Train Driving

Kidwelly to Portsmouth

Updated: 31 May 2026

The journey from Kidwelly to Portsmouth covers approximately 320 km. By train, you will typically travel via Swansea, Bristol, and then transfer to a service to Portsmouth. Driving involves taking the A48, M4, M25, and A3. This route takes you through the heart of England into the coastal city of Portsmouth. Expect a total travel time of approximately 5 hours by train. Portsmouth is famous for its naval history, the Spinnaker Tower, and its historic dockyard.

Total Distance: 320 km driving distance, 250 km straight-line air distance.

Fastest Way

Driving, which takes about 4 hours and 15 minutes under normal conditions.

Cheapest Way

Train using an Advance ticket booked at least 6 weeks ahead.

Compare Kidwelly to Portsmouth Routes

	Train Connecting	Driving Direct
Duration	5 hours	4 hours 15 mins
Avg Price	£65 - £150	£45 - £65 in fuel
Operator	Transport for Wales / GWR / South Western Railway	Personal Vehicle
Route	Kidwelly to Portsmouth via Swansea, Bristol, and Southampton.	A48, M4, M25, and A3.
Tip	Book your tickets in advance to save on the cost of the Bristol to Portsmouth leg.	The M25 can be very busy; check for traffic updates.

Travel Tips

Train Booking
Use the Trainline app to compare prices across different operators.
City Transport
Portsmouth city center is compact and easily walkable.
Parking
Use the city center car parks for easy access to the dockyard and shops.
Food
Try the diverse food scene, particularly the seafood restaurants.
Connectivity
Most city center areas have free public Wi-Fi.

Safety Tips

Motorway Safety
Be cautious on the M25 during peak hours due to heavy traffic.
Personal Safety
Stay in well-lit areas when walking at night.
Emergency
Keep a power bank for your phone to ensure you have navigation access.
Vehicle Security
Always lock your car and remove valuables when parked.