The average train between Hounslow and Cardiff takes 2h 37m and the fastest train takes 2h 8m. There is an hourly train service from Hounslow to Cardiff. 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 Hounslow and Cardiff. The earliest departure is at 3:49 AM at night, and the last departure from Hounslow is at 10:32 PM which arrives into Cardiff at 1:08 AM. All services require a transfer, and take on average 2h 37m. The schedules shown below are for the next available departures.

2h 31m • 1 change

2h 38m • 1 change

2h 40m • 1 change

2h 31m • 1 change

4h 17m • 1 change

2h 24m • 1 change

2h 23m • 1 change

2h 21m • 1 change

4h 17m • 1 change

2h 24m • 1 change

2h 23m • 1 change

2h 21m • 1 change
Want to know about travelling from Hounslow to Cardiff? 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 Hounslow to Cardiff. However, there are services departing from Hounslow station and arriving at Cardiff station via Reading. The journey, including transfers, takes approximately 2h 37m.
Hounslow to Cardiff train services, operated by Elizabeth Line (TfL), depart from Southall station.
Hounslow to Cardiff train services, operated by Elizabeth Line (TfL), arrive at Cardiff Central station.
Book your Hounslow to Cardiff train tickets online with Elizabeth Line (TfL) and Great Western Railway (GWR).
The distance between Hounslow and Cardiff is 195.2 km. The road distance is 218 km.
You can take a train from Southall to Cardiff Central via Reading in around 2h 36m.