Is there a direct train?

No, you must change at Swansea or Bristol.

Is Swindon a good place to visit?

Yes, it has great railway history.

Bus travel is not practical for this route.

There are no tolls on the M4 anymore.

Carmarthen

Swindon

Train Driving

Carmarthen to Swindon

Updated: 30 May 2026

The journey from Carmarthen to Swindon covers approximately 220 kilometers. By train, you can travel via Swansea and Bristol Parkway, with a direct connection to Swindon. By car, the route is very straightforward, following the A48 and the M4 motorway directly into Swindon. This is one of the most efficient routes from West Wales into England.

Total Distance: 220 km driving distance; 190 km straight-line air distance.

Fastest Way

Driving, taking approximately 3 hours via the M4.

Cheapest Way

Train, booked as an Advance ticket.

Compare Carmarthen to Swindon Routes

	Train Connecting	Driving Direct
Duration	3 hours 45 mins	3 hours
Avg Price	30-60 GBP	35-50 GBP fuel
Operator	Great Western Railway	N/A
Route	Carmarthen to Swansea, Swansea to Bristol Parkway, Bristol to Swindon.	A48 to M4, follow M4 east to Swindon.
Tip	Swindon station is centrally located and well-connected.	The M4 is a fast route but can be busy near Newport and Bristol.

Travel Tips

M4 Traffic
Check for accidents on the M4 before you leave.
Train Booking
Book your train tickets via the GWR website for no booking fees.
Parking
Swindon has plenty of parking, but the town center can be busy.
Connectivity
The train has good Wi-Fi, making it a productive time for work.
Station Access
Swindon station is fully accessible for those with mobility issues.