The average train between Dunstable and Swansea takes 4h 12m and the fastest train takes 3h 48m. There is a train service every few hours from Dunstable to Swansea. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run hourly between Dunstable and Swansea. The earliest departure is at 5:38 AM in the morning, and the last departure from Dunstable is at 11:07 PM which arrives into Swansea at 9:02 AM. All services require a transfer at Farringdon and take an average of 4h 12m. The schedules shown below are for the next available departures.


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Want to know about travelling from Dunstable to Swansea? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct train from Dunstable to Swansea. However, there are services departing from Dunstable station and arriving at Swansea station via Farringdon. The journey, including transfers, takes approximately 4h 12m.
Dunstable to Swansea train services, operated by Thameslink, depart from Leagrave station.
Dunstable to Swansea train services, operated by Thameslink, arrive at Swansea station.
Book your Dunstable to Swansea train tickets online with Thameslink, Elizabeth Line (TfL) and Great Western Railway (GWR).
The distance between Dunstable and Swansea is 237.3 km. The road distance is 365 km.
You can take a train from Leagrave to Swansea via Farringdon, Farringdon Without, and London Paddington in around 4h 29m.