The average train between Harpenden and Portsmouth takes 2h 54m and the fastest train takes 2h 44m. There is an hourly train service from Harpenden to Portsmouth. 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 Harpenden and Portsmouth. The earliest departure is at 12:12 AM at night, and the last departure from Harpenden is at 8:52 PM which arrives into Portsmouth at 11:53 PM. All services require a transfer, and take on average 2h 54m. The schedules shown below are for the next available departures.

2h 56m • 1 change
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2h 58m • 1 change
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2h 55m • 1 change
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10h 39m • 1 change
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2h 45m • 1 changeWant to know about travelling from Harpenden to Portsmouth? 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 Harpenden to Portsmouth. However, there are services departing from Harpenden station and arriving at Portsmouth & Southsea station via East Croydon station. The journey, including transfers, takes approximately 2h 54m.
Harpenden to Portsmouth train services, operated by Thameslink, depart from Harpenden station.
Harpenden to Portsmouth train services, operated by Southern, arrive at Portsmouth & Southsea station.
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The distance between Harpenden and Portsmouth is 124.2 km. The road distance is 148 km.
You can take a train from Harpenden to Portsmouth & Southsea via East Croydon in around 3h 6m.