How much of height plane can fly?

The altitude at which a plane can fly varies depending on the type of aircraft. Commercial airliners typically cruise at altitudes between 30,000 and 40,000 feet (about 9,000 to 12,000 meters). Smaller general aviation aircraft may fly at lower altitudes, generally below 25,000 feet. Military jets and specialized aircraft can reach altitudes exceeding 50,000 feet.