United Airlines

United Airlines Holdings, formerly known as United Continental Holdings, is among the largest air carriers in the world. It has hubs in Chicago, Denver, Los Angeles, San Francisco and Washington DC and key international gateways in Tokyo, London, Frankfurt, Miami and Toronto. United flies to 109 destinations in 23 countries and operates 791 mainline aircraft. The airline's United Express carriers operate 581 regional aircraft. United is a founding member of the Star Alliance, which provides service to 195 countries via 26 member airlines.