What is the minimum required visibility for VFR flight?

For Visual Flight Rules (VFR) flight, the minimum required visibility is 3 statute miles in the airspace designated under VFR regulations. This visibility requirement is set to ensure that pilots can see and avoid other aircraft, as well as maintain situational awareness with respect to the terrain and obstacles.

In controlled airspace, the visibility requirement can be higher depending on the aircraft's altitude and the airspace class. However, for basic VFR flight operations, the standard requirement is 3 statute miles horizontally. This allows pilots to have a clear line of sight to navigate safely and maintain adequate separation from other aircraft.