There is a mandatory fee of $150 for the Unaccompanied Minor Program, which covers up to four children if multiple children, such as siblings, are travelling together. The fee can be paid one-way or round-trip at the time of check-in or in advance by calling Delta .  Delta Airlines Unaccompanied Minors offers an Unaccompanied Minor Program for children aged 5-14 who are travelling alone. The program provides a dedicated service to ensure the safety and comfort of the child throughout their journey. The program includes: