United Airlines, Inc. is a major American airline with headquarters at Willis Tower in Chicago, Illinois. It is the 3rd largest airline in the world, measured by fleet size and route network. United operates a large domestic and international route network, with an extensive presence in the Asia-Pacific region. It is a founding member of the Star Alliance, the world's largest airline alliance with a total of 28 member airlines. Regional service is operated by independent carriers under the brand name United Express.
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Pets in cabin
the fee applies additionally to the difference between confirmed flight and new one