What is the maximum airspeed within Class B airspace?

In Class B airspace, the maximum indicated airspeed is 250 KIAS (Knots Indicated Airspeed) when flying below 10,000 feet. This regulation is in place to ensure safety and manage the high volume of air traffic typically found in and around busy airports served by Class B airspace. While 300 KIAS might be permissible in certain contexts outside of Class B airspace (such as in controlled airspace above 10,000 feet or in other classes of airspace), it doesn’t apply within Class B. The 250 KIAS limit helps prevent wake turbulence issues and ensures a more manageable environment for both commercial and general aviation aircraft operating in close proximity.