Is there a direct train?

No, you will need to change at Cardiff or Swansea.

How long is the drive?

Approximately 5 hours depending on traffic.

Is the Congestion Charge expensive?

Yes, it is a daily fee for driving in the zone.

Which station do I arrive at?

Trains from Wales typically arrive at London Paddington.

Is it better to take the train?

Yes, it is generally faster and less stressful than driving.

Milford Haven

London

Train Driving

Milford Haven to London

Updated: 30 May 2026

The journey from Milford Haven to London covers approximately 400 km. The most practical way to travel is by train, which takes about 4 hours and 30 minutes, usually requiring a change at Cardiff or Swansea for a direct service to London Paddington. Driving takes around 5 hours via the M4 motorway. This route connects the far west of Wales to the heart of the UK capital. Expect a long but scenic journey through the Welsh countryside and the English Midlands.

Total Distance: 400 km driving distance; 340 km straight-line distance.

Fastest Way

Train, avoiding the heavy traffic often found on the M4 near London.

Cheapest Way

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

Compare Milford Haven to London Routes

	Train Connecting	Driving Direct
Duration	4 hours 30 mins	5 hours
Avg Price	60 GBP - 120 GBP	70 GBP fuel
Operator	Transport for Wales / GWR	N/A
Route	Milford Haven to Cardiff, then GWR to London Paddington.	A40 to M4 motorway.
Tip	Book well in advance to secure the best prices on GWR services.	Avoid driving into central London due to the Congestion Charge.

Travel Tips

London Transport
Use an Oyster card or contactless payment for all Tube and bus travel.
Train Station
London Paddington is the main arrival point for trains from Wales.
Congestion Charge
If driving, be aware of the London Congestion Charge zone in the city centre.
Booking
Use the Trainline or GWR website to book your journey from Milford Haven to London.
Walking
London is a massive city; use the Tube to cover long distances quickly.

Safety Tips

Traffic
The M4 can be extremely busy; check live traffic updates before departing.
Crowds
Be aware of pickpockets in busy tourist areas like Oxford Street.
Night Safety
Stick to well-lit areas and use licensed black cabs or registered minicabs at night.
Emergency
Dial 999 for emergencies; 101 for non-emergency police assistance.