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That depends! The height at which planes fly is influenced by numerous factors, including aircraft type, mission, and design considerations. While most commercial aircraft operate at an altitude of 30,000 to 42,000 feet, many planes soar much higher. Aircraft operate at different altitudes depending on their purpose, engine type, and safety requirements. Typically, commercial airplanes, private jets, military aircraft, and even gliders each have specific flight altitudes to optimize performance, safety, and fuel efficiency. Understanding Altitude: Feet, Meters, and Flight Levels Flight altitude is the vertical distance between an aircraft and the Earth’s surface. This distance is commonly measured in feet, meters, and flight levels. Most commercial airplanes fly at altitudes between 30,000 feet and 42,000 feet above sea level. … Read more