Commercial planes typically fly at cruising altitudes between about 31,000 and 42,000 feet, which is roughly 5.9 to 7.2 miles above the ground

. The most common cruising altitude for passenger jets is around 35,000 feet, or about 6.3 to 6.6 miles high

. Some commercial aircraft can reach service ceilings up to about 43,000 feet (around 7.2 miles), which is the maximum operational altitude for safety and efficiency

. Military aircraft and some private jets can fly even higher, with service ceilings reaching 50,000 to 70,000 feet (about 9.5 to 13.3 miles), depending on the type of aircraft

. Flying at these high altitudes allows planes to benefit from thinner air, which reduces drag and improves fuel efficiency. It also helps avoid weather disturbances and turbulence, providing a smoother and safer flight

. In summary:

• Commercial passenger jets cruise between 31,000 and 42,000 feet (5.9 to 7.2 miles).
• Typical cruising altitude is around 35,000 feet (6.3 to 6.6 miles).
• Maximum service ceiling for commercial jets is about 43,000 feet (7.2 miles).
• Military and some private jets can fly higher, up to 70,000 feet (13.3 miles).

This altitude range optimizes fuel efficiency, safety, and passenger comfort during flights