United Airlines, commonly referred to as United, is a major U.S. airline headquartered in Chicago, Illinois, and is the world's third-largest airline when measured by revenue. United operates a large domestic and international route network, with an extensive presence in the Asia-Pacific region. United is a founding member of Star Alliance, the world's largest airline alliance. Regional service is operated by independent carriers under the brand name United Express.
United Airlines and United Express operate more than 4,500 flights a day to 339 airports across five continents. United operates 737 mainline aircraft and the airline's United Express partners operate 483 regional aircraft. United is proud to have the world's most comprehensive route network, including 216 domestic destinations, 122 international destinations, 50 countries Served, 4,500 daily departures and 143 million passengers in 2016. United is one of the few airlines to fly to all six inhabited continents. As of November 2017, United is the only US airline with service to the cities of Hamburg, Geneva, Melbourne, Chuuk, Kosrae, Pohnpei, Yap, Delhi, Mumbai, Kwajalein, Majuro, Sendai, Sapporo, Taipei, Chengdu, and Xi'an.
United has 9 domestic and international airline hubs in Chicago, Denver, Houston, Los Angeles, New York/Newark, San Francisco, Washington, D.C., Guam and Tokyo and world-class international gateways to Asia and Australia, Europe, Latin America, and the Middle East with non-stop or one-stop service from virtually anywhere in the United States. Chicago-O'Hare is United's largest hub, both in terms of passengers carried annually and in terms of departures.
United offers more premium-cabin flat-bed seats and extra-legroom, economy-class seating than any other airline in North America. There are more than 50 United Clubs and lounges in 31 airports worldwide that offer members complimentary bar service, light snacks and beverages; business amenities such as Wi-Fi, wireless printing and workstations; and personalized assistance with reservations, seat selection, upgrades and boarding passes.
United’s MileagePlus is the world’s most rewarding loyalty program, with a wide array of travel, credit card and retail partners. MileagePlus members may earn elite travel benefits, including Premier Access airport services, and have access to one of the most extensive merchandise redemption programs in the industry. With United’s industry-leading global route network, no other airline offers more destinations for award travel.