Yes. It depends.
No way!
Yes. Passport or another kind of ID.
Yes, If under a certain age like 12 needs supervision. 16 year olds are people around that age are allowed to travel alone.
On American Airlines (the company) infants can travel with a parent from the second day after delivery, although the airline recommends waiting until at least seven days after delivery. Children under 5 years of age may not travel alone. Children under 8 years old may travel alone only on direct flights that do not require a change of aircraft, and may not travel on smaller flights that do not have a cabin attendant. Children traveling alone who are 14 or younger are required to be booked in the Unaccompanied Minors service, which involves an additional fee. Children traveling alone who are 15 - 17 years old may use the Unaccompanied Minors service but are not required to. Those who are 18 and older are adults.
Children under 15 can travel to Canada, using a birth certificate, as long as they are NOT flying. If flying, they would need a Passport.
In order to fly alone from the UK to Holland, airlines such as KLM offer an "Unaccompanied Minor" service that is mandatory for children aged 5 to 14 who are travelling alone. For children aged 15 to 17 the service is optional.
if they fly unacompinied minor they can, it is just an extra fee. Children under 15 (14?) cannot fly alone unless unacompinied minor, and 15-18 is optional.
Yes, they can if they have a passport. My neice was 15 when she traveled alone from and back to the US
14
No! It is too dangerous considering the current world conditions!
Under the American Airlines Unaccompanied Miror Policy “Children age 5 – 14 traveling alone by using unaccompanied minor service. This service is optional for children age 15 – 17, but if requested, then the fee applies.
Yes, a 15-year-old can travel alone internationally, but it depends on the airline and country's regulations. Some airlines and countries may require a minor to have a consent form from a parent or guardian. It is important to check with the airline and destination country for specific requirements.