A bankrupt airline that is soon to be acquired by Indianapolis-based Republic Airways has had its reorganization plan approved by creditors.

Frontier Airlines Holdings, Inc., the parent company of the 5,000-employee Denver airline, said late Wednesday that creditors voted 92 percent in favor of the plan.

“This has been the hallmark of our restructuring efforts,” Frontier President and CEO Sean Menke said. “We have been able to completely restructure our business and reduce our costs to among the lowest in the industry. We have also developed alternative revenue streams.”

A judge is set to confirm the plan on Sept. 10 in the bankruptcy court for the Southern District of New York.

Republic Airways flies high with deal to buy Frontier: From the Aug. 14 Star: Read about Republic’s bid to win Frontier .

Republic offered up $108.8 million for Frontier, which chose that bid over one from rival Southwest Airlines.

Republic expects to close on its purchase of Frontier on or before Oct. 1, 2009, after which Frontier will become a unit of Republic, alongside Milwaukee-based Midwest Airlines and Republic’s other wholly owned subsidiaries.

Meanwhile, Frontier Airlines also announced that it has begun a codesharing agreement with Midwest that will allow the sister airlines to sell tickets on each other’s flights.

Frontier’s Denver passengers — it is the No. 2 flyer at that airport — can reach destinations served by Midwest, such as Cleveland and Pittsburgh, by transferring to a Midwest flight at its Milwaukee hub.