The average train between Haverfordwest and Slough takes 5h 38m and the fastest train takes 4h 40m. The train service runs several times per day from Haverfordwest to Slough. 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 every 3 hours between Haverfordwest and Slough. The earliest departure is at 6:10 AM in the morning, and the last departure from Haverfordwest is at 9:02 PM which arrives into Slough at 7:15 AM. All services require a transfer at Cardiff Central and take an average of 5h 38m. The schedules shown below are for the next available departures.


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4h 40m • 2 changes


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5h • 2 changes
Want to know about travelling from Haverfordwest to Slough? 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 Haverfordwest to Slough. However, there are services departing from Haverfordwest station and arriving at Slough station via Cardiff Central. The journey, including transfers, takes approximately 5h 38m.
Haverfordwest to Slough train services, operated by Transport for Wales, depart from Haverfordwest station.
Haverfordwest to Slough train services, operated by Transport for Wales, arrive at Reading station.
Book your Haverfordwest to Slough train tickets online with Transport for Wales, Great Western Railway (GWR) and Elizabeth Line (TfL).
The distance between Haverfordwest and Slough is 303.1 km. The road distance is 377 km.
You can take a train from Haverfordwest to Slough via Cardiff Central and Reading in around 4h 50m.