Aer Lingus only allows unaccompanied minors between ages 12-15 to fly on direct flights. Children under 12 cannot fly alone. The airline does not provide extra support to unaccompanied minors. Any solo minor must complete an indemnity form signed by a parent and show ID like a passport. Fees for unaccompanied minors range from $80-125 for direct flights and $110-155 for connecting flights within Europe.