What defines an international flight diversion?

An international flight diversion is characterized by a situation where a flight, originally scheduled to operate from the U.S. to a specific international destination, must reroute to an international city instead. This definition emphasizes that for a diversion to be classified as such, it must involve an international context wherein the flight's original purpose was to reach a foreign destination.

Flight diversions typically occur due to various reasons such as weather conditions, mechanical issues, or air traffic control directives. When a flight is diverted from its intended international route to another international location, it reflects a procedural response to unforeseen circumstances while still operating within the framework of international aviation.

The other options do not align with this definition. A flight operating strictly within the U.S. or with a domestic final destination does not involve international considerations, hence they would not qualify as international flight diversions. Similarly, while a diversion from one international city to another might seem related, it does not stem directly from a flight departing from the U.S., thus failing to meet the criteria defined for an international flight diversion originating from the U.S.