Which of the following best describes an aircraft's operation when flying between two cities with more than one leg on the same aircraft?

When flying between two cities with more than one leg on the same aircraft, the operation is best described as a connection. A connection occurs when a passenger travels from one city to another with one or more stops en route, often involving layovers where the aircraft may change or route through different airports. This term encompasses the idea that a single journey may involve several flight segments, each operated sequentially on the same aircraft, allowing passengers to reach their final destination efficiently.

The term "direct flight" generally refers to a flight that goes from the origin to the destination without needing to change planes, despite potentially stopping at one or more intermediate airports. "Charter flight" refers to flights that are not part of the regular airline schedule and are usually booked for a specific group or purpose. "Circumnavigation" is a term that describes flying around a specific geographic area or the entire globe, which does not pertain to the context of connecting flights between two cities. Thus, the best representation of the flight operation involving multiple legs on the same aircraft is a connection.