The average bus between Milton Keynes and Portsmouth takes 5h 3m and the fastest bus takes 3h 50m. The bus service runs several times per day from Milton Keynes 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 Milton Keynes and Portsmouth. The earliest departure is at 6:50 AM in the morning, and the last departure from Milton Keynes is at 9:30 PM which arrives into Portsmouth at 2:15 AM. All services require a transfer, and take on average 5h 3m. The schedules shown below are for the next available departures.

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Arrives next day

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Arrives next day

5h 10m • 1 change

4h • 1 change

5h 35m • 1 change

6h 10m • 1 change

6h • 1 change

3h 50m • 1 change

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5h 30m • 1 change

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Want to know about travelling from Milton Keynes 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 Milton Keynes to Portsmouth. However, there are services departing from Milton Keynes station and arriving at Portsmouth station via London Heathrow Airport. The journey, including transfers, takes approximately 5h 3m.
Milton Keynes to Portsmouth bus services, operated by FlixBus, depart from Milton Keynes station.
Milton Keynes to Portsmouth bus services, operated by FlixBus, arrive at St Georges Square station.
Book your Milton Keynes to Portsmouth bus tickets online with FlixBus and National Express.
The distance between Milton Keynes and Portsmouth is 140.1 km. The road distance is 201 km.
You can take a bus from Milton Keynes to St Georges Square via Heathrow Central Bus Station in around 4h 29m.