Mesa Air Group, Inc. operates as the holding company for Mesa Airlines, Inc. that provides regional air carrier services under capacity purchase agreements with the American Airlines and the United Airlines. It also engages in leasing aircrafts to third parties. As of September 30, 2021, the company operated a fleet of 167 aircraft, which include 153 owned aircrafts and 14 leased aircrafts with approximately 507 daily departures to 129 cities in the United States and Mexico.