Frontier Airlines that has been serving the passengers across the United States may be sold very soon. The airline is holding talks with a Phoenix based private equity firm and the negotiations might turn fruitful in the near future. Apparently, the firm intends to turn the Denver based carrier into an ultra-low-fare airline and follow the business philosophies of rivals Spirit Airlines and Allegiant Air.

Trenton Mercer and New Castle near Wilmington are two airports dedicatedly served by Frontier. The airline currently operates 35 outbound flights to ten cities per week from Trenton and has 14 flights departing for five cities every week from Wilmington.

Most of the airline’s flights are 90 to 95 percent occupied at the time of departure. Experts suggest that the airline has done a great job in past and hence any buyer would be keen on taking over and develop relationships with the two airports.

Republic Airways Holdings, which currently owns Frontier disclosed a few days ago that it had signed a nonbinding agreement with an unnamed buyer. The deal is under process and is expected to close towards the end of September 2013.

Indigo Partners L.L.C., a Phoenix based firms is suspected to be the potential buyer. This firm has keen interests in investing in low cost airlines around the world. It holds stakes in Spirit, Singapore based Tiger Airways and Hungary’s Wizz Air.

Frontier has been running business on an ideology much similar to that of Spirit and Allegiant. It uses a combination of smaller secondary airports that charge lesser landing fees but hold proximity to large metropolitan area and some major airports.