How far out does the 200kt speed restriction extend from Class C and D airports?

The 200-knot speed restriction around Class C and Class D airports extends out to 4 nautical miles (nm) from the airport's airspace boundary. This regulation is important because it helps maintain safety in the vicinity of these airports, where aircraft are often in a high-density area and may be maneuvering at lower altitudes.

The 4 nm perimeter allows air traffic control to manage and sequence arriving and departing aircraft effectively while ensuring that pilots operate their aircraft at a safe speed during the critical phase of flight close to these airports. The speed restriction applies below 2,500 feet above ground level within that 4 nm radius, helping to mitigate the risks associated with high-speed operations in the congested airspace surrounding these airports.