The average bus between Hounslow and Portsmouth takes 2h 28m and the fastest bus takes 2h 1m. The bus service runs several times per day from Hounslow 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.
Buses run every 4 hours between Hounslow and Portsmouth. The earliest departure is at 12:12 AM at night, and the last departure from Hounslow is at 10:13 PM which arrives into Portsmouth at 12:30 AM. All services require a transfer, and take on average 2h 28m. The schedules shown below are for the next available departures.

2h 1m • 1 change

2h 35m • 1 change

2h 40m • 1 change

2h 55m • 1 change

2h 2m • 1 change

2h 16m • 1 change

2h 32m • 1 change

2h 42m • 1 change

2h 1m • 1 change

2h 19m • 1 change

2h 40m • 1 change

2h 39m • 1 change

2h 1m • 1 change

2h 35m • 1 change

2h 40m • 1 change

2h 30m • 1 change

2h 1m • 1 change

2h 35m • 1 change

2h 25m • 1 change

2h 55m • 1 change

2h 1m • 1 change

2h 35m • 1 change

2h 25m • 1 change

2h 55m • 1 change
Want to know about travelling from Hounslow 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 bus from Hounslow to Portsmouth. However, there are services departing from Hounslow station and arriving at Portsmouth station via Heathrow Terminal 5. The journey, including transfers, takes approximately 2h 28m.
Hounslow to Portsmouth bus services, operated by First Bus London, depart from Treaty Centre station.
Hounslow to Portsmouth bus services, operated by First Bus London, arrive at St Georges Square station.
The distance between Hounslow and Portsmouth is 90.2 km. The road distance is 115 km.
You can take a bus from Treaty Centre to St Georges Square via Heathrow Terminal 5 in around 2h 56m.