A "One-Way Ticket" is a travel document that allows a passenger to travel from one location to another without a return journey. It is commonly used for trips where the traveler does not plan to return to the original departure point, such as moving to a new city or traveling for an extended period. These tickets can be purchased for various modes of transportation, including airplanes, trains, and buses. One-way tickets are often more flexible than round-trip tickets, as they do not require a specific return date, making them popular among backpackers and expats.