Bill Franke is a prominent American businessman known for his significant contributions to the airline industry. He is the founder and managing partner of Indigo Partners, a private equity firm that specializes in investing in low-cost airlines. Under his leadership, the firm has successfully invested in several airlines around the world, including Wizz Air and Spirit Airlines. Franke has a long history in the aviation sector, having previously served as the CEO of America West Airlines. His strategic vision and expertise have helped shape the low-cost airline model, making air travel more accessible to millions of passengers globally.