In September 2015, it was announced that InterSky was still loss-making and the owner, German investor Intro Aviation, planned to sell the company entirely. All flights from Memmingen Airport and Zürich Airport as well as the Friedrichshafen-Düsseldorf route were likely to be terminated. Additionally, InterSky tries to find another usage for their two ATR72-600s whose purchase back in 2013 has been called a mistake. In October 2015, InterSky reported to be in advanced negotiations with a potential investor from Germany willing to pay 5 million Euros for the airline. Shortly after, the Austrian aviation authorities requested InterSky to provide information over their financial security by 5 November 2015. Otherwise their operational license could be revoked. On 4 November 2015, the aforementioned sale agreement fell through. In the same time, InterSky submitted the requested documents regarding their financial security to the Austrian authorities. Shortly after, the airline announced plans to go into administration while maintaining operations.