Failed takeover by Lufthansa and IAG
On 17 August 2017, Niki's parent Air Berlin announced it was filing for bankruptcy but that all operations would continue until further notice. On 9 October 2017, Air Berlin told its staff that it would cease all remaining operations under its own brand name, but that Niki flights would continue after this date.
On 12 October 2017, it was announced that German Lufthansa would purchase some of the assets from Air Berlin which included Niki and operations would continue and jobs were to be saved.[17] On 24 October 2017, it was announced that Niki was to be absorbed into Lufthansa's low-cost subsidiary Eurowings Europe.[18] It was announced that Lufthansa had plans to cease the Niki brand by the end of 2017 altogether.[19]
However, on 13 December 2017, Lufthansa pulled out of the agreement due to signs from the European Commission that the merger would not be approved.[20] Niki declared bankruptcy and ceased all operations on 14 December 2017.[21] The day after, former owner Niki Lauda expressed interest in repurchasing the airline named after him.[22]
On 29 December 2017, it was announced that International Airlines Group (IAG), parent company of British Airways, Iberia, Aer Lingus and Vueling, would acquire for 36.5 million euros major parts of Niki including 15 Airbus A321 aircraft and traffic rights in Düsseldorf, Munich, Vienna, Zurich and Palma de Mallorca. IAG planned to establish a new Austrian subsidiary of Spanish low-cost carrier Vueling as a replacement for Niki.[23] For this purpose, a new subsidiary of Vueling in Austria was to be founded and act independently. Of the approx. 1000 Niki employees, 740 were to be retained. On 8 January 2018, a Berlin administrative court ruled that only an Austrian court had the jurisdiction to handle the insolvency of Niki.[24]