![Empty Niki check-in counters are seen at Vienna International Airport in Schwechat, Austria December 14, 2017. REUTERS/Heinz-Peter Bader Stock Photo - Alamy Empty Niki check-in counters are seen at Vienna International Airport in Schwechat, Austria December 14, 2017. REUTERS/Heinz-Peter Bader Stock Photo - Alamy](https://c8.alamy.com/comp/2CN5888/empty-niki-check-in-counters-are-seen-at-vienna-international-airport-in-schwechat-austria-december-14-2017-reutersheinz-peter-bader-2CN5888.jpg)
Empty Niki check-in counters are seen at Vienna International Airport in Schwechat, Austria December 14, 2017. REUTERS/Heinz-Peter Bader Stock Photo - Alamy
![Empty Niki check-in counters are seen at Vienna International Airport in Schwechat, Austria December 14, 2017. REUTERS/Heinz-Peter Bader Stock Photo - Alamy Empty Niki check-in counters are seen at Vienna International Airport in Schwechat, Austria December 14, 2017. REUTERS/Heinz-Peter Bader Stock Photo - Alamy](https://l450v.alamy.com/450v/2cj809f/empty-niki-check-in-counters-are-seen-at-vienna-international-airport-in-schwechat-austria-december-14-2017-reutersheinz-peter-bader-2cj809f.jpg)
Empty Niki check-in counters are seen at Vienna International Airport in Schwechat, Austria December 14, 2017. REUTERS/Heinz-Peter Bader Stock Photo - Alamy
![The check-in area of Air Berlin's subsidiary company Niki are barred at Tegel Airport in Berlin, Stock Photo, Picture And Rights Managed Image. Pic. PAH-171214-99-274154-DPAI | agefotostock The check-in area of Air Berlin's subsidiary company Niki are barred at Tegel Airport in Berlin, Stock Photo, Picture And Rights Managed Image. Pic. PAH-171214-99-274154-DPAI | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/b540826e1ee47961f4d8d7abc4119738/pah-171214-99-274154-dpai.jpg)
The check-in area of Air Berlin's subsidiary company Niki are barred at Tegel Airport in Berlin, Stock Photo, Picture And Rights Managed Image. Pic. PAH-171214-99-274154-DPAI | agefotostock
![Empty Niki check-in counters are seen at Vienna International Airport in Schwechat, Austria December 14, 2017. REUTERS/Heinz-Peter Bader Stock Photo - Alamy Empty Niki check-in counters are seen at Vienna International Airport in Schwechat, Austria December 14, 2017. REUTERS/Heinz-Peter Bader Stock Photo - Alamy](https://l450v.alamy.com/450v/2cmnb96/empty-niki-check-in-counters-are-seen-at-vienna-international-airport-in-schwechat-austria-december-14-2017-reutersheinz-peter-bader-2cmnb96.jpg)
Empty Niki check-in counters are seen at Vienna International Airport in Schwechat, Austria December 14, 2017. REUTERS/Heinz-Peter Bader Stock Photo - Alamy
![VIENNA, AUSTRIA - AUGUST 12, 2015: People Walking Inside The.. Stock Photo, Picture And Royalty Free Image. Image 52859422. VIENNA, AUSTRIA - AUGUST 12, 2015: People Walking Inside The.. Stock Photo, Picture And Royalty Free Image. Image 52859422.](https://previews.123rf.com/images/radub85/radub851603/radub85160300011/52859422-vienna-austria-august-12-2015-people-walking-inside-the-terminal-of-vienna-international-airport-bui.jpg)
VIENNA, AUSTRIA - AUGUST 12, 2015: People Walking Inside The.. Stock Photo, Picture And Royalty Free Image. Image 52859422.
![Empty Niki check-in counters are seen at Vienna International Airport in Schwechat, Austria December 14, 2017. REUTERS/Heinz-Peter Bader Stock Photo - Alamy Empty Niki check-in counters are seen at Vienna International Airport in Schwechat, Austria December 14, 2017. REUTERS/Heinz-Peter Bader Stock Photo - Alamy](https://c8.alamy.com/comp/2CJ809F/empty-niki-check-in-counters-are-seen-at-vienna-international-airport-in-schwechat-austria-december-14-2017-reutersheinz-peter-bader-2CJ809F.jpg)