Who is responsible for closing a filed flight plan?

The responsibility for closing a filed flight plan lies with the pilot. Upon completion of a flight, it is crucial for the pilot to inform the appropriate authorities that the flight has safely concluded. This protocol helps ensure the safety of operations, as it allows air traffic control and flight services to have up-to-date information on active flights. If a flight plan is not closed, it may lead to unnecessary search and rescue operations if the aircraft doesn't arrive as expected.

While air traffic controllers and flight service stations provide valuable support and resources, they do not assume the responsibility of closing flight plans. The co-pilot, while integral to flight operations, is also not tasked specifically with this responsibility unless otherwise delegated by the pilot in command. It is ultimately the pilot's duty to ensure the flight plan is closed, thereby maintaining safety and effective communication within the aviation system.