| http://www.w3.org/ns/prov#value | - The numbers are a major improvement from the disappointing fourth quarter in 2012 and a relief given the strong performance of Delta Air Lines Inc. (NYSE:DAL), which itself surpassed earnings estimates this quarter, and the expected strong performance of United???s other main rivals, American Airlines Group Inc. (NASDAQ:AAL) and Southwest Airlines Co. (NYSE:LUV), which will report on Tuesday, Jan.
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