"About 180,000 passengers will be affected as a result of the strike," Lufthansa writes in a statement after the company lost a legal process in Frankfurt am Main to try to stop the strike.

Ufo says the strike will affect all airlines' flights starting in Germany.

Prosecutions back and forth

However, Lufthansa's CEO hopes to avert the strike through late negotiations, CEO Carsten Spohr has invited Ufo and two other unions on Wednesday night.

Cabin crew unions say it is carrying out the strike when the lock-up with Lufthansa's management is complete. Lufthansa, in turn, accuses Ufo of not having a mandate to represent the cabin crew.