United also operates twice-daily flights to San Salvador from its Houston hub.About United United Airlines and United Express operate an average of 5,557 flights a day to 378 airports on six continents from the airline's hubs in Chicago, Cleveland, Denver, Guam, Houston, Los Angeles, New York/ Newark, San Francisco, Tokyo and Washington, D.C. In 2011, United carried more traffic than any other airline in the world, and operated more than two million flights carrying 142 million passengers. United is upgrading its cabins with more flat-bed seats in first and business class and more extra-legroom economy-class seating than any other airline in North America. United now has 180 airplanes featuring DIRECTV®, offering customers more live television access than any other airline in the world. United operates nearly 700 mainline aircraft and has orders for more than 270 new aircraft deliveries through 2022. In 2012, United was the first North American airline to take delivery of new Boeing 787 Dreamliner aircraft. United was rated the world's most admired airline on FORTUNE magazine's 2012 airline-industry list of the World's Most Admired Companies. Readers of Global Traveler magazine have voted United's MileagePlus program the best frequent flyer program for eight consecutive years. United is a founding member of Star Alliance, which provides service to 193 countries via 27 member airlines. More than 85,000 United employees reside in every U.S. state and in countries around the world. For more information, visit united.com or follow United on Twitter and Facebook. The common stock of United's parent, United Continental Holdings, Inc., is traded on the NYSE under the symbol UAL. SOURCE United Continental Holdings, Inc.