Looking for a 24-hour cancellation option with Aer Lingus? Aer Lingus allows passengers to cancel their booking within 24 hours without facing any fees, as long as the booking was made at least 7 days before departure. This policy is perfect for travelers who need flexibility after booking. To take advantage of this offer, make sure to cancel your booking via the Aer Lingus website or by contacting their customer service within the specified time.