No. Once you're 18 you need a government issued photo I.D., but anyone 17 or under does not need any I.D. flying Domestically (within the USA). If you want to visit Another Country, then certainly you need a passport, and possibly a visa (or more), depending on where you're going, and how long you're staying.
Most states say that a child should have a state ID at the age of 12 but if your military dependents you have to have an ID at the age of 10. hopefully this answers your question.
Internationally a passport is required. Internally in most countries a driver's license is sufficient.
For US airlines it is 16 years old.
For US airlines it is 16 years old.
It is possible that a 17 year old can fly from Melbourne to LAX without assistance. United Airlines allows a 17 year old to travel as an unaccompanied minor for a certain fee and only on non stop flights.
Most airlines let you fly alone at about 13/14.
american airlines
A 17 year old can fly without the assistance of a parent or guardian, as an unaccompanied minor on United Airlines. They can only fly this was on non stop flights. If flying from Melbourne, Florida to LAX, it is possible.
No, a 17 year old must be assisted to LAX from Melbourne on Virgin Airlines by a parent or guardian since he is considered a minor.
Not unless she's accompanied by a responsible adult. Airlines will rarely allow unaccompanied children to fly, because of insurance regulations.
Depends on which airlines you wish to fly with. Check their website - there usually is a section for unaccompanied minors.
No.
In most cases, there will not be a problem with an 18 year old escorting an 11 year old. Check with the airlines as to their requirements. Some may require a 21 year old to be with them.
It depends on the airline your flying with. Most Airlines require you to be 18 to buy a ticket. but really you can be any age to fly in a airplane.