United Airlines and United Express operate approximately 4,700 flights a day to 356 airports across five continents. In 2017, United and United Express operated more than 1.6 million flights carrying more than 148 million customers. United is proud to have the world's most comprehensive route network, including U.S. mainland hubs in Chicago, Denver, Houston, Los Angeles, Newark/New York, San Francisco and Washington, D.C. United operates 760 mainline aircraft and the airline's United Express carriers operate 546 regional aircraft. The airline is a founding member of Star Alliance, which provides service to 193 countries via 28 member airlines. For more information, visit united.com
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. The common stock of United's parent, United Continental Holdings, Inc., is traded on the Nasdaq under the symbol "UAL".