It depends upon your flight route and fare type. Some tickets are fully refundable, some are partially refundable, while some (Saver/Plus/Smart) are non-refundable.
In the following guide, you'll learn how to cancel your flight and request a refund, how 24-hour Aer Lingus Flight cancellations work, what to do if your flight is canceled or rescheduled, compensation for delayed flights, and much more.
https://flightcancellationpoli....cy.com/aer-lingus-ca