According to this news report:

http://biz.yahoo.com/djus/030224/1955001005_1.html

"CHICAGO -- An executive for UAL Corp. (NYSE:UAL - News) said Monday that the airline is mulling the closure of its hubs in Los Angeles, Denver and Washington as part of its reorganization plan.

Senior Vice President Gregory T. Taylor said in court testimony that UAL, parent of United Airlines, was asked by its board of directors to consider the hub closures as an alternative. The board also asked the company to look into the possible sale of the airline's Pacific operations, he said...."