London to Cardiff by train
London Paddington → Cardiff Central · 145 miles · from 1h 50m
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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
Travel 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.
Tickets are sold by the operators and by National Rail retailers. One thing worth knowing if you are travelling from overseas: some fares issue as a collection code that requires a station machine and the original payment card, which is awkward on arrival. Ask for an e-ticket where the fare allows it.
Want to talk it through first? Call +1 (888) 821-4679 — free, and no obligation.
