Such operations shall comply with paragraph (a) of this section. (c) No person may operate an aircraft in the airspace underlying a Class B airspace area designated for an airport or in a VFR corridor designated through such a Class B airspace area, at an indicated airspeed of more than 200 knots (230 mph).

Under both FAA (US) and EASA (European) regulations in 2026, the general speed limit for aircraft operating under VFR (Visual Flight Rules) below 10,000 feet MSL is 250 knots (approximately 288 mph). This "universal" speed limit is designed to provide pilots with enough time to "see and avoid" other aircraft in the most congested parts of the airspace. There are, however, even stricter "sub-limits" to be aware of: if you are flying underneath a Class B airspace "shelf" or through a VFR corridor, the limit is reduced to 200 knots. Similarly, when operating within 4 nautical miles of a primary Class C or D airport and below 2,500 feet, the limit is also 200 knots. For 2026 pilots of high-performance or turbine aircraft, managing these speed "steps" is a critical part of the descent profile. The only legal exception to these limits is if the aircraft's minimum safe airspeed (clean configuration) is higher than the limit, in which case the pilot is permitted to operate at that minimum safe speed to maintain controlled flight.