Articles like this don't help matters:

http://www.usatoday.com/travel/fligh...nkruptcy_N.htm

Notable quotes:

* "We do not see a future for Frontier as it faces tough competition in Denver from United on the network side and Southwest on the low-cost side," Calyon Securities airline analyst Ray Neidl said Friday.

* Frontier lost $32.5 million in last year's fourth quarter — more than double its loss in the same period the year before — and its fuel costs rose 22% from late 2006, according to a document filed with the U.S. Bankruptcy Court.