A noncustodial parent is a parent who does not have physical and/or legal custody of his/her child by court order. << you can be considered a non-custodial parent even while having shared physical and/or legal custody.
A "child-custody determination" means a judgment, decree, or other order of a court providing for the legal custody, physical custody, or visitation with respect to a child. The term includes a permanent, temporary, initial, and modification order. The term does not include an order relating to child support or other monetary obligation of an individual. Where the child will only live with one of the parents, sole physical custody is ordered, and the parent with which the child lives is the custodial parent, the other parent is the non-custodial parent.
Note, however, where the child will live with both parents, joint physical custody is ordered, and both parents are custodial parents. In the case of joint physical custody a 50/50 equal shared parenting schedule is typically not required, therefore the joint custodial parent may have the minority of time with the child but not be said to be a non-custodial parent. For example, states such as Alabama, California, and Texas do not necessarily require joint custody orders to result in substantially equal parenting time, whereas states such as Arizona, Georgia, and Louisiana do require joint custody orders to result in substantially equal parenting time where feasible.
There are two kinds of child custody: legal custody and physical custody. Physical custody, designates where the child will live, whereas legal custody gives the custodial person(s) the right to make decisions for the child's welfare. Often one parent will retain physical custody, while sharing joint legal custody with the other parent. The noncustodial parent is typically required to pay child support, and visitation is arranged.
The noncustodial parent might live in the same city as their child or reside in another city, state or country. Most airlines offer “unaccompanied minor” services for children traveling without a parent, guardian, or another trusted adult. The age requirements generally used by the airlines are between the ages of five and eleven years old (and sometimes up to 15 - it is always advisable to contact the airline to make sure that they accept unaccompanied minors as passengers). Fees charged for unaccompanied minor services are usually assessed per direction and have been doubled with the downturn of the US economy.