What is the maximum airspeed below 10,000 feet?

The maximum airspeed below 10,000 feet is 250 knots. This regulation is part of the airspeed limitations specified under Federal Aviation Administration (FAA) regulations and encompasses general aviation, military, and commercial operations. The 250-knot limit serves several purposes, including maintaining a safe and efficient flow of air traffic, as well as reducing noise pollution in the vicinity of populated areas.

Above certain altitudes, aircraft may have different speed restrictions based on airspace classifications; however, below 10,000 feet, the restriction is uniformly set to 250 knots. This rule applies to all aircraft operating under visual flight rules (VFR) as well as instrument flight rules (IFR), promoting a standardized approach to speed management in lower airspace.