Yes, 14-year-olds can fly alone on Delta Air Lines, and they fall into a specific transitional category in Delta’s policy. For children aged 5 to 14, Delta’s Unaccompanied Minor (UM) service is mandatory. This service includes a dedicated staff member to escort the teen through the airport, priority boarding, and a required fee (typically $150 each way) to ensure the child is handed off only to the authorized adult at the destination. Once a teen turns 15, the service becomes optional. However, since a 14-year-old is still in the mandatory bracket, you must book the flight specifically through the "Unaccompanied Minor" portal or over the phone to ensure the proper paperwork is generated. This policy is strictly enforced to ensure the safety of the minor and to provide peace of mind for parents. The teen will be given a wristband to wear, and they will be monitored by flight attendants throughout the duration of the flight. It is important to note that 14-year-olds using this service are not permitted to board the last connecting flight of the day to avoid the risk of them being stranded in a hub overnight.