London to Cardiff by train
London Paddington → Cardiff Central · 145 miles · from 1h 50m
145 miles
1h 50m
Half-hourly
1
London to Cardiff
Through the Severn Tunnel into Wales — under two hours from Paddington to the Welsh capital.
Why this journey is worth it
- The 4.3-mile Severn Tunnel
- Under two hours to Wales
- Rugby international match-day services
- Onward connections to Swansea and West Wales
Agent's tip
Six Nations weekends sell out months ahead — book as soon as fixtures are announced.
Operators on this route
A single operator runs this route, so the saving comes from ticket type, Railcard eligibility and split-ticket construction rather than from operator comparison.
Principal calling points
| # | Station |
|---|---|
| 1 | London Paddington |
| 2 | Reading |
| 3 | Swindon |
| 4 | Bristol Parkway |
| 5 | Newport |
| 6 | Cardiff Central |
Calling patterns vary by departure and by operator. Some services run non-stop between the principal cities. Timetables are set by the operators and change without notice — confirm at the time of booking.
Getting the cheapest fare
Advance fares on this route release roughly twelve weeks before departure and the lowest tier can disappear within days. A Railcard takes a third off most fares. And on longer journeys a split at an intermediate station frequently saves more than either.
Call +1 (888) 821-4679 and we will test all three, apply what you qualify for and issue e-tickets wherever the fare permits — because a station collection code is a genuine problem when you are arriving from overseas.
