Stagecoach West first said it would cease the 200 bus on April 2 due to low passenger numbers.
Rachel Geliamassi, Managing Director at Stagecoach West said: “We are currently in talks with the relevant local authorities to determine whether their funding for the Service 200 will continue from August 2022. This will determine whether the service can continue to operate.
"We will notify customers as soon as we have had confirmation.”
The 200 service provides a link between Daventry and Banbury, stopping at a number of villages including Chipping Warden, Byfield, Woodford Halse, Charwelton and Badby.