The average train between Portsmouth and Knebworth takes 3h and the fastest train takes 2h 24m. There is an hourly train service from Portsmouth to Knebworth. 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 Portsmouth and Knebworth. The earliest departure is at 4:35 AM at night, and the last departure from Portsmouth is at 10:37 PM which arrives into Knebworth at 6:44 AM. All services require a transfer at London Waterloo Station and take an average of 3h. The schedules shown below are for the next available departures.


2h 53m • 2 changes


2h 53m • 2 changes


2h 53m • 2 changes
Arrives next day


2h 31m • 2 changes


3h 11m • 2 changes


2h 55m • 2 changes


3h 1m • 2 changes


3h 1m • 2 changes


3h 11m • 2 changes


2h 55m • 2 changes


3h 1m • 2 changes


3h 1m • 2 changes
Want to know about travelling from Portsmouth to Knebworth? 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 Portsmouth to Knebworth. However, there are services departing from Portsmouth station and arriving at Knebworth station via London Waterloo. The journey, including transfers, takes approximately 3h.
Portsmouth to Knebworth train services, operated by South Western Railway, depart from Portsmouth & Southsea station.
Portsmouth to Knebworth train services, operated by South Western Railway, arrive at Knebworth station.
Book your Portsmouth to Knebworth train tickets online with South Western Railway, London Underground (Tube) and 2 other operators.
The distance between Portsmouth and Knebworth is 134.3 km. The road distance is 162 km.
You can take a train from Portsmouth & Southsea to Knebworth via London Waterloo Station, Waterloo station, Euston station, and King's Cross in around 2h 50m.