Depart from the United States Law and Legal Definition
According to 22 CFR 46.1 [Title 22. Foreign Relations; Chapter I. Department of State; Subchapter E. Visas; Part 46. Control of Aliens Departing from the United States] the term depart form the United States means “depart by land, water, or air (1) from the United States for any foreign place, or (2) from one geographical part of the United States for a separate geographical part of the United States: Provided, that a trip or journey upon a public ferry, passenger vessel sailing coastwise on a fixed schedule, excursion vessel, or aircraft, having both termini in the continental United States or in any one of the other geographical parts of the United States and not touching any territory or waters under the jurisdiction or control of a foreign power, shall not be deemed a departure from the United States.”