How long is the drive?

About 4.5 hours via the M4 and A3.

Is Portsmouth walkable?

Yes, the main attractions are clustered near the harbor.

National Express operates direct coaches from Swansea to Portsmouth.

Best way to the Dockyard?

Train to Portsmouth Harbour station.

Burry Port

Portsmouth

Train Driving

Burry Port to Portsmouth

Updated: 30 May 2026

The journey from Burry Port to Portsmouth covers approximately 300 km. By train, you will travel to Swansea, then to London Paddington, transfer to London Waterloo, and take a South Western Railway train to Portsmouth Harbour. Driving involves taking the M4 and then the A3, which is the most direct road route. Portsmouth is a historic naval city, and this journey is popular for those visiting the Historic Dockyard. Expect a travel time of around 5 hours and 30 minutes by rail. The drive is generally straightforward but subject to traffic near the M25 interchange.

Total Distance: Driving distance 300 km, straight-line air distance 260 km.

Fastest Way

Driving, taking approximately 4 hours and 30 minutes under normal traffic conditions.

Cheapest Way

Train, if booked as an Advance ticket well in advance.

Compare Burry Port to Portsmouth Routes

	Train Connecting	Driving Direct
Duration	5 hours 30 mins	4 hours 30 mins
Avg Price	65-120 GBP	55-85 GBP fuel
Operator	Great Western Railway / South Western Railway	N/A
Route	Burry Port to Swansea, Swansea to London Paddington, transfer to Waterloo, Waterloo to Portsmouth Harbour.	M4 to M25, then A3 south to Portsmouth.
Tip	Ensure you book a ticket to Portsmouth Harbour, not just Portsmouth and Southsea, if visiting the Dockyard.	The A3 is a scenic route but can be slow through towns; stick to the A3(M) where possible.

Travel Tips

Dockyard Access
The Historic Dockyard is a short walk from Portsmouth Harbour station.
London Transfer
Allow at least 45 minutes for the transfer between Paddington and Waterloo.
Train Booking
Use the Trainline app to monitor for delays on the South Western Railway line.
Parking
Use the Gunwharf Quays car park for easy access to the city center.
Station Facilities
Portsmouth Harbour station is right next to the ferry terminals.

Safety Tips

Harbor Safety
The harbor area is busy; stay on designated pedestrian paths.
Personal Safety
Keep your bags close in the busy London transfer stations.
Driving Fatigue
The 4.5-hour drive is long; take a break at a motorway service station.
Emergency
Dial 999 for police or medical assistance.