Under 2026 FAA regulations (specifically 14 CFR 91.119), the minimum altitude for aircraft depends on the density of the area below. Over congested areas (cities, towns, or open-air assemblies), pilots must maintain an altitude of at least 1,000 feet above the highest obstacle within a 2,000-foot horizontal radius. In sparsely populated or rural areas, the limit is 500 feet above the surface, except over open water where they simply cannot be within 500 feet of any person, vessel, or structure. These rules do not apply during takeoff or landing, which is why homes near airports experience much lower flights. Helicopters are granted more flexibility and can fly lower than these minimums provided the operation is conducted safely. In 2026, local noise ordinances often exist, but they are generally subordinate to these federal safety altitudes, which are designed to ensure a pilot can make an emergency landing without hitting anything on the ground.