In Australia, the age at which a child can fly alone depends on the airline, but the general standard in 2026 is that a child must be at least 5 years old to fly as an Unaccompanied Minor (UM). Airlines like Qantas and Virgin Australia offer a mandatory UM service for children aged 5 to 11 (and optional up to 15), which involves dedicated staff supervision from check-in to the final handover at the destination. A child is generally considered an "independent traveler" once they reach 12 years of age, meaning they can fly without a supervisor, though some airlines still require them to be at least 15 for international routes. It is important to note that children under 5 are strictly prohibited from flying without a person who is at least 15 years old. For 2026 travelers, it is a peer-to-peer best practice to book the UM service well in advance, as there is often a limit on the number of unaccompanied children allowed per flight, and a service fee of approximately $50 to $100 AUD per leg typically applies.