In which type of airspace are VFR flights prohibited?

VFR flights, or Visual Flight Rules flights, are prohibited in Class A airspace. This is because Class A airspace is designated for high-altitude flights, primarily used by commercial airliners and other aircraft operating under Instrument Flight Rules (IFR). In this airspace, aircraft must operate at altitudes of 18,000 feet above sea level and above, where air traffic control (ATC) manages all flights to ensure safety and efficiency. The requirement for IFR means pilots must be qualified to fly in reduced visibility and rely on instruments for navigation, which aligns poorly with the principles of VFR, where pilots navigate visually and must maintain specific weather conditions.

In contrast, the other classes of airspace—B, C, and D—allow VFR flights under certain conditions, as these airspaces are typically managed to accommodate a mix of both VFR and IFR traffic, focusing on maintaining separation and safety among all types of flights.