An article from the street dot com.

Republic put Frontier on the block in 2011, and in October 2013 finally inked a deal to sell the unit to Indigo Partners for $36 million in cash and about $109 million in transferred debt. Notably, Republic was unable to drop a $3 billion order for new planes made with Frontier in mind into the deal, and now will likely drop that order as part of its restructuring.