A full round trip is a travel itinerary that begins at an origin city, travels to a destination city (the "outbound" leg), and eventually returns to the exact same origin city (the "inbound" leg) using the same mode of transport or the same ticket. In the airline industry, this is the most common type of booking. It is distinct from a "One-Way" trip, which only goes from A to B, and an "Open-Jaw" trip, where you might fly from London to New York but then return to London from Boston. A full round trip is often cheaper for travelers than two separate one-way tickets because airlines use "round-trip pricing" models to encourage loyalty and simplify their scheduling. From a logistical standpoint, a full round trip means your journey is "complete" once you have returned to your starting point. In some specialized contexts, like a "Round the World" (RTW) ticket, the trip is considered a massive round trip because you start and end in the same city, even though you might visit ten different countries in between. Essentially, the "round" refers to the circular nature of the path, ending where it began.