According to Lufthansa's 2026 policy, a 12-year-old is permitted to fly alone without the mandatory Unaccompanied Minor (UM) service. Lufthansa requires the special care service only for children aged 5 to 11. However, for children aged 12 to 17, parents have the option to book the "care service" if they want extra peace of mind, especially for long-haul flights with connections. If you do not book the service, the 12-year-old is treated as a "young passenger," meaning they must be able to navigate the airport, clear security, and handle potential flight delays or gate changes independently. It is highly recommended to provide the child with a consent form signed by both parents and a working smartphone with the Lufthansa app. Even though the airline allows it, you should check the entry requirements of the destination country, as some nations have specific documentation rules for minors traveling without legal guardians, regardless of the airline's internal age thresholds.