Niki is scheduled to operate where?
Niki destinations: As of March 2017, Austrian leisure airline Niki serves the following scheduled destinations. Niki (airline):  It operates scheduled and charter services to European and North African leisure destinations from Vienna, Salzburg, Graz and Innsbruck and also started services from several German airports in March 2017.
European and North African leisure destinations from Vienna, Salzburg, Graz and Innsbruck