The average train between Heathrow Terminals 5 and Southampton takes 1h 52m and the fastest train takes 1h 45m. There is a train service every few hours from Heathrow Terminals 5 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 Terminals 5 and Southampton. The earliest departure is at 6:42 AM in the morning, and the last departure from Heathrow Terminals 5 is at 9:42 PM which arrives into Southampton at 11:45 PM. All services require a transfer at London Paddington and take an average of 1h 52m. The schedules shown below are for the next available departures.


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Want to know about travelling from Heathrow Terminals 5 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 Terminals 5 to Southampton. However, there are services departing from Heathrow Terminals 5 station and arriving at Southampton station via Reading. The journey, including transfers, takes approximately 1h 52m.
Heathrow Terminals 5 to Southampton train services, operated by Heathrow Express, depart from London Paddington station.
Heathrow Terminals 5 to Southampton train services, operated by Heathrow Express, arrive at Southampton Central station.
Book your Heathrow Terminals 5 to Southampton train tickets online with Heathrow Express, Great Western Railway (GWR) and Cross Country.
The distance between Heathrow Terminals 5 and Southampton is 89.9 km. The road distance is 158 km.
You can take a train from Heathrow Terminal 5 to Southampton Central via London Paddington and Reading in around 2h 41m.