Airlines' 'Mr. Fix It' wants to save the world's worst carrier By: CNBC.com News February 04, 2019 at 08:00 AM EST Bill Franke, whose private equity firm Indigo Partners owns discount airline Frontier, likes no-frills fares and fees for everything else. Read More >> Related Stocks: American Airlines Gp Atyr Pharma Inc Jetblue Airways Corp Spirit Airlines Inc United Airlines Holdings Inc