The company canceled 876 of the Lufthansa group`s planned 3,000 flights on Wednesday and said that around 100,000 passengers were affected. It expressed "complete incomprehension" at Cockpit`s decision to extend the strike.
Other Lufthansa group airlines such as Eurowings, Swiss and Austrian Airlines aren`t affected by the walkout.
The latest strike by Cockpit is the 14th since April 2014 in the long-running dispute.
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