Some airlines automatically apply the unaccompanied-minor procedures to kids through age 17 on international flights, and charge the standard unaccompanied-minor fee if applicable. Children must usually have the same passport, visa or other international entry documentation required of adults.

Yes, most major full-service airlines allow unaccompanied minors (UMs) to fly internationally, but the rules are much stricter than for domestic flights. Generally, the service is mandatory for children aged 5 to 14, while for those aged 15 to 17, it is often optional. Airlines like Air India, Delta, and British Airways provide a "buddy" system where staff escorts the child through security, customs, and immigration. However, parents must complete extensive documentation, including notarized letters of consent from both guardians and detailed "Unaccompanied Minor" forms. Fees for this service on international routes typically range from $150 to $300 per way. Notably, many low-cost carriers (like Spirit or Ryanair) do not offer this service at all, requiring minors to travel with an adult. Always arrive at the airport at least 3 hours early for international UM travel to ensure all legal and airline-specific paperwork is verified.