Frontier Group Holdings Inc. filed for a rare U.S. airlines initial public offering.
The no-frills carrier filed with an initial offering size of $100 million, according to a filing Friday, which is a placeholder amount used to calculate fees and will change.
The company is aiming to go public as soon as the second quarter of this year, people familiar with the matter have said.
Indigo Partners, the private equity firm that owns Frontier, is led by veteran airline executive William Franke, who has extensive experience overseeing discount carriers. The firm once controlled Spirit Airlines Inc., which went public in 2011, and is the largest shareholder in Wizz Air Holdings Plc, a low-fare operator in Eastern Europe.
Airline IPOs in the U.S. are rare. Virgin America Inc. was the last to go public, raising $353 million in November 2014, including an over-allotment. The carrier…