The average bus between Portsmouth and Harrow takes 2h 52m and the fastest bus takes 2h 33m. The bus service runs several times per day from Portsmouth to Harrow. 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 Portsmouth and Harrow. The earliest departure is at 3:20 AM at night, and the last departure from Portsmouth is at 8:10 PM which arrives into Harrow at 10:49 PM. All services require a transfer, and take on average 2h 52m. The schedules shown below are for the next available departures.

2h 35m • 1 change
2h 57m • 1 change
2h 51m • 1 change
3h 11m • 1 change
2h 35m • 1 change
2h 57m • 1 change
2h 51m • 1 change
3h 11m • 1 change
2h 35m • 1 change
2h 57m • 1 change
2h 51m • 1 change
3h 11m • 1 change
2h 34m • 1 change
2h 57m • 1 change
2h 51m • 1 change
2h 55m • 1 change
2h 33m • 1 change
2h 41m • 1 change
2h 49m • 1 change
3h 13m • 1 change
2h 35m • 1 change
2h 39m • 1 change
2h 39m • 1 change
3h • 1 change
2h 35m • 1 change
2h 57m • 1 change
2h 51m • 1 change
2h 55m • 1 changeWant to know about travelling from Portsmouth to Harrow? 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 Portsmouth to Harrow. However, there are services departing from The Hard Interchange station and arriving at Harrow Bus Station via Heathrow Central Bus Station. The journey, including transfers, takes approximately 2h 52m.
Portsmouth to Harrow bus services, operated by National Express, depart from The Hard Interchange station.
Portsmouth to Harrow bus services, operated by First Bus London, arrive at Harrow Bus Station.
The distance between Portsmouth and Harrow is 101.6 km. The road distance is 120 km.
You can take a bus from The Hard Interchange to Harrow Bus Station via Heathrow Central Bus Station in around 2h 54m.