Yes, Ryanair Airlines has a 24-hour cancellation policy that allows passengers to cancel their flights without penalty if the booking is made at least 24 hours +𝟏-𝟖𝟎𝟖-𝟕𝟓𝟏-𝟐𝟐𝟔𝟐 (𝐔𝐒𝐀) 𝐨𝐫 +𝟒𝟒-𝟐𝟎𝟑-𝟗𝟎𝟎-𝟑𝟎𝟎𝟗 (𝐔𝐊) before the scheduled departure. This policy applies to both domestic and international flights.

https://support.google.com/accounts/thread/306080842?hl=de&sjid=4423155473175851700-AP