"If UAL does not elect to pay the current fee, the airline must sever the relationship and try to find more IAD feed in addition to TSA. How will this news effect UAL's IAD hub, the new business plan, the POR, and the DIP revenue and cash flow targets after December 31?"
UAL has until DEC, so no worries. Air Willy and Skywest would gladly add more RJ's to IAD (as would "mid atlantic"). It will be good ridance to get rid of the worst customer service airline I've ever experienced. It's laughable that they think they can operate an airline of RJ's with a CASM around 15-16 cents a mile and survive on the east coast. When the stock TANKS they'll likely come groveling back.