Cabin crew in Spain at the Irish airline Ryanair have been on strike since June this year.
Now the Spanish unions USO and Sitcpla are calling on their members to strike from Monday to Thursday every week until January 7.
Although employees have been on strike since the end of June, with more than 300 flights canceled as a consequence, Ryanair has refused to negotiate an improvement in the employees' working conditions, writes El País.
According to the airline, the strike has very little effect on air travel in general.
Spanish legislation requires that flight staff offer minimum service even during strikes, and therefore travelers are affected to a lesser extent than in other countries, Reuters reports.
Requires reemployment of dismissed personnel
The unions demand that the airline start complying with the country's labor laws and that they agree to negotiate collective agreements.
In addition, they request that the eleven employees who were dismissed in connection with the strike be rehired.
"We are not asking for wage increases of 167 percent as Ryanair claims, but wage updates that range from 8 percent for those with the highest wages to 16 percent for those workers who do not even reach the minimum wage," the USO writes in a press release.
According to El País, a quarter of all passengers to and from Spain travel with Ryanair.
On Wednesday, nine flights were canceled and 42 were delayed due to the strike.
The most affected cities are Barcelona, Madrid, Malaga and Palma de Mallorca, reports the news agency EFE.
Javascript is disabled
Javascript must be enabled to play video
Read more about browser support
The Amahead incident and the shootings in Ådalen are two of the conflicts that have come to shape modern Swedish labor law.
See how the right to strike has changed over the years in the clip.
Photo: SVT