The average train between Southampton Airport (SOU) and Mountain Ash takes 3h 37m and the fastest train takes 3h 8m. There is a train service every few hours from Southampton Airport (SOU) to Mountain Ash. 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 Southampton Airport (SOU) and Mountain Ash. The earliest departure is at 6:24 AM in the morning, and the last departure from Southampton Airport (SOU) is at 8:23 PM which arrives into Mountain Ash at 11:31 PM. All services require a transfer at Reading and take an average of 3h 37m. The schedules shown below are for the next available departures.


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Want to know about travelling from Southampton Airport (SOU) to Mountain Ash? 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 Southampton Airport (SOU) to Mountain Ash. However, there are services departing from Southampton Airport (SOU) station and arriving at Mountain Ash station via Reading. The journey, including transfers, takes approximately 3h 37m.
Southampton Airport (SOU) to Mountain Ash train services, operated by Cross Country, depart from Southampton Airport Parkway station.
Southampton Airport (SOU) to Mountain Ash train services, operated by Cross Country, arrive at Mountain Ash station.
Book your Southampton Airport (SOU) to Mountain Ash train tickets online with Cross Country, Great Western Railway (GWR) and Transport for Wales.
The distance between Southampton Airport (SOU) and Mountain Ash is 161.9 km. The road distance is 274 km.
You can take a train from Southampton Airport Parkway to Mountain Ash via Reading and Cardiff Central in around 3h 48m.