When is a flight plan required for VFR flights?

A flight plan is necessary for VFR flights in certain controlled airspace to enhance safety and ensure proper communication with air traffic control. Specifically, in Class C and D airspace, pilots are required to establish two-way radio communication with the control tower, and while not mandated to file a formal flight plan, doing so is strongly recommended as it assists with traffic separation and management.

However, a flight plan is not required in Class A airspace, which is primarily for IFR flights, nor is it required every time a VFR flight takes place. Filing a flight plan is particularly beneficial when flying at night, but it is not a requirement solely based on the time of day. Thus, the reliance on VFR flight plans in Class C and D airspace aligns with guidelines from aviation authorities for ensuring safe operations within these regions.