Fare increases of up to 20p have been announced by Oxford Bus Company for a number of city routes, as well as its London services.
The last rise came in 16 months ago.
The company said city single fares for adults and children would rise by 10p, adult returns by 20p and child returns by 10p.
Park-and-ride fares remained unchanged.
Adult singles and returns on the X90 service will both rise by £1.
The changes take effect from May 18.
For a full list, visit oxfordbus.co.uk/pricechanges