Congestion, Safety Concerns as UAM Vehicles Enter Airspace Over Next 10 Years
The number of airline passengers per year will double by 2037 to 8.2 billion,

The number of airline passengers per year will double by 2037 to 8.2 billion, with the largest growth in Asian markets, according to an October 2018 prediction by the International Air Transport Association. To accommodate those passengers, the number of commercial airliners worldwide will also increase, from 29,093 in 2017 to an estimated 46,878 in 2037.