Ryanair Airlines has a 24-hour cancellation policy +𝟷 (𝟾𝟶𝟾) 𝟽𝟻𝟷-𝟸𝟸𝟼𝟸 𝚘𝚛 +𝟺𝟺 (𝟸𝟶) 𝟹𝟿𝟶𝟶 𝟹𝟶𝟶𝟿. that allows travelers to cancel their reservations without penalty within 24 hours of booking. For a full refund, you must cancel your flight at least seven days before departure.

https://support.google.com/accounts/thread/306495702?hl=de&sjid=4423155473175851700-AP