How long after a VFR flight plan's ETA is an aircraft considered overdue?

An aircraft is considered overdue 30 minutes after its estimated time of arrival (ETA) when operating under a VFR (Visual Flight Rules) flight plan. This standard is in place to ensure timely action is taken for search and rescue operations if necessary. The 30-minute interval allows for possible delays that might occur during a flight due to various factors such as weather conditions or air traffic delays.

When pilots file a VFR flight plan, it signifies an intention to operate under certain conditions that might not involve continuous monitoring by air traffic control. In the event that the aircraft has not arrived by the ETA plus 30 minutes, it raises a concern about the safety of the aircraft and its occupants. Therefore, procedures for reporting and searching for the overdue aircraft are initiated at this point to ensure prompt assistance, should it be needed.