What is the maximum altitude that a remote pilot can fly under Part 107 flight rules, clear of obstacles?

Under Part 107 flight rules, the maximum altitude that a remote pilot can fly a small unmanned aircraft system (sUAS) is 400 feet Above Ground Level (AGL), unless they are flying within a structure. This altitude limit is established to maintain safety in the national airspace and to prevent conflicts with manned aircraft, which generally operate at higher altitudes.

Flying at or below this altitude ensures that remote pilots are operating their sUAS in a way that minimizes risk to manned aircraft and allows for a safe separation from obstacles and other flights. The regulation is designed to promote responsible aviation practices while enabling the integration of sUAS into the airspace. Any flight above this limit is considered hazardous, as the risk of collision with manned aircraft significantly increases.