United Airlines route map - North America from Denver

United Airlines, Inc. (commonly referred to simply as "United") is an American major airline headquartered in Chicago, Illinois. United is a wholly owned subsidiary of United Continental Holdings following a $3 billion merger in 2010. The airline was previously owned, at one point in its history, by The Boeing Company, one of the world's largest aircraft manufacturers. Since its merger with Continental Airlines, the company boasts more revenue passenger miles than any airline in the world.

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