In which type of airspace are VFR flights prohibited?

• A. Class A
• B. Class B
• C. Class C
• D. Class D

Answer: (A)

The key idea is that VFR flights are not allowed in Class A airspace. This high-altitude layer starts at 18,000 feet MSL and extends up to FL600. In this space, every operation must be conducted under IFR with ATC clearance. The environment is highly controlled, with fast traffic and limited opportunity for visual separation, and there are no published VFR weather minimums to guarantee safe flight visually. So pilots fly under instrument flight rules to ensure proper separation and standard procedures. The same reason why VFR isn’t permitted here also explains why, in contrast, VFR operations are allowed in the lower classes under appropriate weather minimums and ATC coordination.