Following the example of British airline Flybe and under the impression of the low-cost boom that had emerged in Europe, he radically changed the business model.

In accordance with InterSky's claim to sustainable growth, investments were only financed from surpluses - rather unusual for the aviation industry.

InterSky flew to Tempelhof until the end and on the last day before the closure, they conducted several sightseeing flights to say goodbye to the airport together with the employees.

On one of the last Tempelhof flights, pilot Viggo Bergers said goodbye in front of hundreds of onlookers with the usual aviation wobble of the wings.

In 2004, after the departure of Hahn Air Lines, InterSky starts relocate its operational base to Friedrichshafen Airport in Germany, which was not fully utilized in Bern.

[6] Since OLT Express Germany filed for bankruptcy shortly afterwards, InterSky started operating the route in March 2013 on a wet-lease contract with Avanti Air.

In May 2015, InterSky announced plans to open its second base at Memmingen Airport by October 2015 consisting of one aircraft, adding a new route to Cologne and increasing frequencies on existing services to Berlin and Hamburg.

[10] 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.

[12] 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.

[1] However, on the evening of 5 November 2015, InterSky announced that they were forced to cease all operations immediately as the lessor of its fleet seized four of the airline's five aircraft - both ATR 72-600s and two Bombardier Dash 8 Q300s - over unpaid leasing charges on short notice.

[1][16] All four aircraft were returned to the lessor immediately, while the remaining one - which was owned by InterSky - operated the last flight from Zürich to Graz.