Every day, FAA 's Air Traffic Organization ( ATO ) provides service to more than 45,000 flights and 2.9 million airline passengers across more than 29 million square miles of airspace. With an airspace system as vast and complex as ours, it is helpful to have an easy-to-reference source for relevant facts and information. View the infographic below for a glimpse into ATO , or for more information, see Air Traffic by the Numbers ( PDF ) . * based on FY19 figures