The average bus between Portsmouth and Windsor Castle takes 2h 38m and the fastest bus takes 2h 14m. The bus service runs several times per day from Portsmouth to Windsor Castle. 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 Windsor Castle. The earliest departure is at 3:20 AM at night, and the last departure from Portsmouth is at 8:10 PM which arrives into Windsor Castle at 11:10 PM. All services require a transfer at Heathrow Terminal 5 and take an average of 2h 38m. The schedules shown below are for the next available departures.

2h 19m • 1 change

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2h 48m • 1 change

2h 44m • 1 change

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2h 15m • 1 change

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2h 50m • 1 change

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2h 14m • 1 change

2h 41m • 1 change

2h 50m • 1 change

2h 19m • 1 change

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2h 48m • 1 change

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2h 44m • 1 change
Want to know about travelling from Portsmouth to Windsor Castle? 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 Windsor Castle. However, there are services departing from Portsmouth station and arriving at Windsor Castle station via Heathrow Terminal 5. The journey, including transfers, takes approximately 2h 38m.
Portsmouth to Windsor Castle bus services, operated by National Express, depart from The Hard Interchange station.
Portsmouth to Windsor Castle bus services, operated by National Express, arrive at Parish Church station.
Book your Portsmouth to Windsor Castle bus tickets online with National Express and Thames Valley Buses.
The distance between Portsmouth and Windsor Castle is 83.3 km. The road distance is 118 km.
You can take a bus from The Hard Interchange to Windsor Castle via Heathrow Terminal 5 and Parish Church in around 2h 45m.