Chicago-based United Airlines Holdings, Inc. (UAL) is a leading provider of air transportation services across seven continents worldwide. The company operates both mainline and regional fleets to transport passengers and cargo. In addition to its transportation services, UAL offers third-party catering, ground handling, training, and maintenance solutions. Originally known as United Continental Holdings, Inc., the company underwent a rebranding in June 2019 to reflect its focus on air travel services. Established in 1968, UAL has been providing top-tier air transport services to customers for over five decades.