In an ordinary custody and visitation order issued by the Court there are not travel restrictions unless there has been a specific motion and hearing on that subject. In private mediation, some couples will negotiate specific limitations on travel. This concern typically arises in one of several common cases:
a) when as a couple they have traveled frequently and have younger children,
b) when they have relatives that live out of state which one party might want to visit for an extended trip (summer vacation) or
c) when one party was born, or has family, outside the USA.
If there is a mediated visitation agreement then the Court will almost inevitably accept the limits as negotiated by the parents and incorporate that into a custody order.