All airlines have an escort service for minors to accompany them throughout the journey (from arrival at the airport of origin to arrival at the destination). In these cases, the minor will wear a vest with the initials UM (unaccompanied minor), recognized in all airports in the world. You have all the information in: «Preparing for the plane trip: tips and troubleshooting«.
You have all the information in: "Preparing for the plane trip: tips and troubleshooting".