Going, Going, Gone?

The slogan "come fly the friendly skies" could be a thing of the past at DIA.

Some airline analysts say United Airline’s hub at Denver International Airport could be subject to a shutdown. They say the airline giant's hubs at DIA and Washington DC's Dulles Airport are the most vulnerable to elimination or downsizing as the company tries to exit bankruptcy protection.

They add service could be covered by a hub in Chicago.

Airline officials call the claims speculation, calling the hub "the most profitable". Parent company UAL flies 60 percent of DIA's passengers and employs more than 6,000 people. It has hubs also in San Francisco and Los Angeles.