The average train between Romsey and Swansea takes 3h 57m and the fastest train takes 3h 18m. There is a train service every few hours from Romsey 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 Romsey and Swansea. The earliest departure is at 6:59 AM in the morning, and the last departure from Romsey is at 9:22 PM which arrives into Swansea at 12:44 AM. All services require a transfer, and take on average 3h 57m. The schedules shown below are for the next available departures.

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Want to know about travelling from Romsey 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 Romsey to Swansea. However, there are services departing from Romsey station and arriving at Swansea station via Cardiff Central. The journey, including transfers, takes approximately 3h 57m.
Romsey to Swansea train services, operated by Great Western Railway (GWR), depart from Romsey station.
Romsey to Swansea train services, operated by Great Western Railway (GWR), arrive at Swansea station.
Book your Romsey to Swansea train tickets online with Great Western Railway (GWR) and Transport for Wales.
The distance between Romsey and Swansea is 183.8 km. The road distance is 244 km.
You can take a train from Romsey to Swansea via Cardiff Central in around 3h 31m.