The average train between Hertfordshire and Portsmouth takes 2h 47m and the fastest train takes 2h 19m. The train runs at least 2 times per hour from Hertfordshire 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 every 30 minutes between Hertfordshire and Portsmouth. The earliest departure is at 12:28 AM at night, and the last departure from Hertfordshire is at 10:22 PM which arrives into Portsmouth at 1:20 AM. All services require a transfer at London Kings Cross and take an average of 2h 47m. The schedules shown below are for the next available departures.
Arrives next day


3h • 2 changes
Arrives next day


2h 58m • 2 changes


6h 47m • 2 changes


2h 50m • 2 changes


2h 37m • 2 changes


2h 25m • 2 changes


3h 37m • 2 changes


2h 55m • 2 changes


2h 35m • 2 changes


2h 37m • 2 changes
Want to know about travelling from Hertfordshire 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 Hertfordshire to Portsmouth. However, there are services departing from Hertfordshire station and arriving at Portsmouth station via King's Cross. The journey, including transfers, takes approximately 2h 47m.
Hertfordshire to Portsmouth train services, operated by Great Northern, depart from Welwyn Garden City station.
Hertfordshire to Portsmouth train services, operated by Great Northern, arrive at Portsmouth & Southsea station.
Book your Hertfordshire to Portsmouth train tickets online with Great Northern, London Underground (Tube) and South Western Railway.
The distance between Hertfordshire and Portsmouth is 129 km. The road distance is 155 km.
You can take a train from Welwyn Garden City to Portsmouth & Southsea via London Kings Cross, Euston station, Waterloo Station, and London Waterloo in around 2h 37m.