The average train between Heathrow and Southampton takes 2h and the fastest train takes 1h 46m. There is a train service every few hours from Heathrow to Southampton. 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 Heathrow and Southampton. The earliest departure is at 6:55 AM in the morning, and the last departure from Heathrow is at 9:55 PM which arrives into Southampton at 11:45 PM. All services require a transfer at Hayes And Harlington Station and take an average of 2h. The schedules shown below are for the next available departures.


1h 47m • 2 changes


1h 46m • 2 changes


1h 46m • 2 changes


1h 48m • 2 changes


1h 46m • 2 changes


1h 52m • 2 changes


1h 51m • 2 changes


1h 47m • 2 changes


1h 46m • 2 changes


1h 52m • 2 changes


1h 51m • 2 changes


1h 47m • 2 changes


1h 46m • 2 changes


1h 52m • 2 changes


1h 51m • 2 changes


1h 47m • 2 changes
Want to know about travelling from Heathrow to Southampton? 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 Heathrow to Southampton. However, there are services departing from Heathrow station and arriving at Southampton station via Reading. The journey, including transfers, takes approximately 2h.
Heathrow to Southampton train services, operated by Elizabeth Line (TfL), depart from Hayes And Harlington Station.
Heathrow to Southampton train services, operated by Elizabeth Line (TfL), arrive at Southampton Central station.
Book your Heathrow to Southampton train tickets online with Elizabeth Line (TfL) and Cross Country.
The distance between Heathrow and Southampton is 91.2 km. The road distance is 121 km.
You can take a train from Heathrow Terminals 2 & 3 to Southampton Central via Hayes And Harlington Station and Reading in around 2h 33m.