What is the average cruising height o a Boeing 747?

The average cruising altitude of a Boeing 747 typically ranges from 35,000 to 45,000 feet, with most flights commonly cruising around 35,000 to 40,000 feet. This altitude allows for optimal fuel efficiency and avoids most weather disturbances and commercial air traffic. The specific cruising height can vary based on factors such as flight route, weight, and air traffic control instructions.