Airspace from the surface to 2,500 feet above the airport elevation surrounding those airports that have an operational control tower is which class?

• A. Class E
• B. Class D
• C. Class B
• D. Class G

Answer: (B)

Airspace around airports that have an operating control tower is designated to start at the surface and rise to a defined ceiling above the airport. This block is Class D airspace, typically extending up to 2,500 feet above the airport elevation within about a 4-mile radius. That’s the portion where the tower provides traffic control for both IFR and VFR operations.

Beyond that limit, the airspace transitions to Class E, while Class G would be the uncontrolled space outside towered airport areas. Class B and Class C are reserved for larger, busier airports with different, more restrictive entry and separation rules.