Yes, Aer Lingus offers discounted fares for infants and children. Infants up to 2 years of age are charged 10% of the accompanying adult’s fare. Children between 2 – 12 years of age are charged 75% of the applicable adult fare (in most cases).  However, if you’re an adult traveling with 2 infants, only 1 infant is allowed to sit on your lap. The other child must be able to occupy a separate seat using a pre-approved car seat. The extra seat’s fare will be the same as the fare for children between 2 -12 years of age, i.e., 75% of the adult fare, but it can only be booked through an Aer Lingus ticket office or a travel agency. However, children traveling on Royal Laurel Class fares are not permitted to use child restraint systems.