The average bus between Harlington and Portsmouth takes 2h 7m and the fastest bus takes 1h 54m. The bus service runs several times per day from Harlington 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 Harlington and Portsmouth. The earliest departure is at 12:13 AM at night, and the last departure from Harlington is at 10:35 PM which arrives into Portsmouth at 12:30 AM. All services require a transfer, and take on average 2h 7m. The schedules shown below are for the next available departures.

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Want to know about travelling from Harlington 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 Harlington to Portsmouth. However, there are services departing from Harlington station and arriving at Portsmouth station via St Georges Square. The journey, including transfers, takes approximately 2h 7m.
Harlington to Portsmouth bus services, operated by Abellio London, depart from Heathrow Central Bus Station.
Harlington to Portsmouth bus services, operated by Abellio London, arrive at St Georges Square station.
The distance between Harlington and Portsmouth is 89.2 km. The road distance is 110 km.
National Express operates a bus from Heathrow Central Bus Station to St Georges Square hourly. Tickets cost £12–30 and the journey takes 1h 50m.