Air Traffic Has Been Growing Rapidly for the Last 60 Years (image) University of South Carolina Share Print E-Mail Caption The number of people travelling by air has grown from 46 million passengers in 1956 to 3 billion in 2016. Air travel is projected to hit at least 7.2 billion passengers and millions of drones by 2035. Credit Aerospace America and the Federal Aviation Administration. Usage Restrictions With credit to University of South Carolina, College of Engineering and Computing. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.