The average bus between Milton Keynes and Porton Down takes 8h 13m and the fastest bus takes 5h 35m. The bus service runs several times per day from Milton Keynes to Porton Down. 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 3 times a day between Milton Keynes and Porton Down. 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 Porton Down at 10:03 AM. All services require a transfer at Heathrow Central Bus Station and take an average of 8h 13m. The schedules shown below are for the next available departures.



5h 43m • 3 changes



6h 7m • 3 changes



7h 22m • 3 changes
Arrives next day



12h 33m • 3 changes



7h 13m • 3 changes



6h 49m • 3 changes



7h 22m • 3 changes
Arrives next day



12h 33m • 3 changes



7h 13m • 3 changes



6h 49m • 3 changes



7h 22m • 3 changes
Arrives next day



12h 33m • 3 changes
Want to know about travelling from Milton Keynes to Porton Down? 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 Porton Down. However, there are services departing from Milton Keynes station and arriving at Porton Down station via London Heathrow Airport. The journey, including transfers, takes approximately 8h 13m.
Milton Keynes to Porton Down bus services, operated by FlixBus, depart from Milton Keynes station.
Milton Keynes to Porton Down bus services, operated by FlixBus, arrive at Meeting House Lane station.
The distance between Milton Keynes and Porton Down is 121.6 km. The road distance is 263 km.
You can take a bus from Milton Keynes to Firs Road Top via Heathrow Central Bus Station, Meeting House Lane, New Canal, and Endless Street in around 6h 15m.