Commercial airliners typically cruise at altitudes between 30,000 and 42,000 feet above sea level. This range, often referred to as the “sweet spot,” represents a balance between optimal fuel efficiency and comfortable cabin pressurization. For instance, a Boeing 747 often cruises at around 35,000 feet.
Cruising at these altitudes offers several advantages. The thinner air at higher altitudes presents less aerodynamic drag, leading to reduced fuel consumption and increased range. Weather systems are largely avoided, contributing to smoother flights and fewer delays. The historical development of pressurized cabins has been essential for enabling comfortable passenger travel at these altitudes.
