Grantchester is served by the Whippet 18 bus route. The timetable as of 1 April 2024 can be found here.
From Tuesday 27 May 2025, Stagecoach are operating a new bus route: Grantchester to Fulborn, via Addenbrookes Hospital. This runs Monday to Friday, excluding bank holidays, and on Saturdays from 31 May 2025.
This is route T3.
The timetable and details can be found here.
(Updated 16 5 2025)