- Cirrus Airlines was a German regional airline that operated from 1995 to 2012. The airline was based in Saarbrücken and mainly served domestic and European destinations. Cirrus Airlines operated a fleet of mostly turboprop aircraft, such as the ATR 42 and 72, as well as some regional jets like the Embraer ERJ 135. The airline faced financial difficulties and in 2012, it filed for insolvency, leading to the cessation of its operations.