On Monday, employees of Scandinavian Airlines began a four day strike, but many returned to work that evening. The workers went on strike over the airline's plan to transfer employees to a subsidiary that operates domestic flights. Approximately 1,300 employees participated in the walk-off causing 50 flights out of Denmark to be cancelled.
See "Labor Disputes Disrupt SAS, Norwegian Flights in Scandinavia", The New York Times, March 2, 2015