An airline
United Air Lines, Inc., trading as United Airlines (NASDAQ: UAUA), is a major airline of the United States.[2] It is a subsidiary of UAL Corporation with corporate offices in Chicago at 77 West Wacker Drive in the Chicago Loop. United's largest hub is O'Hare International Airport, where it has more than 550 daily departures. United also has hubs in Denver International Airport, Washington Dulles International Airport, San Francisco International Airport, and Los Angeles International Airport. United's route network spans the globe with route authorities in North America, Europe, Asia, Austraila, the Middle East, Latin America, the Caribbean, and beginning in May of 2010, United will begin service from Washington D.C. to Accra & Lagos, making it the second US carrier to serve Africa in modern times and one of the few airlines in the world serving all 6 continents except Antarctica. A founding member of the Star Alliance, the largest airline alliance in the world, United offers connections to over 1,000 destinations in over 170 countries worldwide. [3] United's largest maintenance hub is the Maintenance Operations Center at San Francisco International Airport. United's parent company UAL Corporation announced that it will move its operational base from Elk Grove Township, Illinois to the Willis Tower (formerly Sears Tower) in the Chicago Loop in 2010.[4]
As of July 31, 2006, United was the world's third largest airline by revenue-passenger-miles (behind Delta Air Lines and American Airlines), third-largest by total operating revenues (behind Air France-KLM and American Airlines), and fourth-largest by total passengers transported (behind Delta Air Lines, American Airlines and Southwest Airlines). United has 48,000 employees[4] and operates 360 aircraft.