How Low Can Planes Fly?
In the strictest physical sense, only the altitude of the ground and the physical obstacles upon it would limit the lowest altitude at which a plane can fly. However, there are a wide array of procedural constraints and legal requirements that make the answer to this question more interesting. After all, neither airliners nor small planes are permitted to cruise along at treetop level over populated areas. Indeed, numerous pilots have gotten into serious trouble for “buzzing” someone’s house.
