What is the speed limit under Class B airspace?

In Class B airspace, the maximum speed limit is indeed 250 knots. However, within Class B airspace specifically, the speed limit is reduced to 200 knots when operating below 2,500 feet above the ground or within 4 nautical miles of the primary airport's airspace.

The 200 knots limit is put in place to ensure better management of high-density traffic situations typically found near major airports. The goal is to reduce the risk of wake turbulence and allow air traffic control to maintain an orderly flow of aircraft within busy airspace. Certain conditions and factors, such as the proximity to an airport or other air traffic, influence these speed restrictions within Class B zones, which is vital for safety in air operations.