Children can travel by themselves as an unaccompanied minor from the time they are 5 years old. Most airlines will require these children to fly on a non-stop flight.
From 5 to 11 years of age, parents must pay an unaccompanied minor fee for children to fly alone. This extra fee in addition to the price of the airfare ensures that the minor has a flight attendant escort while on the plane. It is likely that children will spend some time alone at some point, which is important for parents to note. Once children turn 12, parents have the option to book them to fly solo, or they can also pay the unaccompanied minor fee. This fee can apply to children until they turn 18 years of age.