"Cruising altitude" refers to the height at which an aircraft flies during the majority of its journey. This altitude is typically between 30,000 and 40,000 feet above sea level, where the air is thinner, allowing for more efficient fuel consumption. Pilots choose this altitude to optimize performance and ensure passenger comfort. At cruising altitude, the aircraft maintains a steady speed and altitude, minimizing turbulence and providing a smoother ride. This phase of flight usually occurs after takeoff and ascent, and before descent and landing, making it a crucial part of the overall flight experience.