DUESSELDORF, GERMANY - 03.09.2017 Aircraft of the Niki Airlines Airberlin Partner at the Airport Editorial Photo - Image of aerospace, boeing: 100535001
NIKI – Flying made easy – the waygabounds
List of Niki destinations - Wikipedia
Ex-racing driver Lauda back at the controls of his airline Niki
Report: Ex-Formula 1 star Niki Lauda buys back airline he founded - MotorSportsTalk | NBC Sports
Austrian low-cost (fly)Niki ceases all operations on 14 December 2017 - Aviation24.be
Air Berlin Sells Niki to Etihad for Creation of New Leisure Airline