Yes, you can change your Ryanair flight within 24 hours of booking without a fee. After 24 hours, changes incur a fee. For assistance, contact customer service at+𝟏(𝟖𝟎𝟖) 𝟕𝟓𝟏-𝟐𝟐𝟔𝟐 (𝐔𝐒𝐀) 𝐨𝐫 +𝟒𝟒 (𝟐𝟎) 𝟑𝟗𝟎𝟎𝟑𝟎𝟎𝟗 (𝐔𝐊). It’s best to make changes as soon as possible to avoid higher fees.

https://support.google.com/admob/thread/307155464?hl=en&sjid=15835951200074388411-AP