Lufthansa has cancelled almost 200 hundred flights in and out of Frankfurt airport as the dispute over a pay rise for staff continues.
An 11-hour walkout is also planned by workers at Munich.
Union UFO, which represents about two-thirds of the company’s cabin crew, wants salaries increased by five percent.
“I can partly understand this. The cabin crew have their jobs, but when more and more outsourcing is happening for less money, it’s not right in the long run,” said passenger Klaus Gerhard.
Lufthansa has offered staff an increase of 3.5 percent, but wants cabin crew to work longer hours.
Unsatisfied with this, UFO are threatening more widespread industrial action.
“If this arrogance continues then we will increase our strikes, which have so far been locally-restricted. We will have to see what happens within the next days. Germany is standing still for 24 hours,” said UFO head Nicoley Baublies.
Friday’s stoppage left 26,000 passengers stranded and cost Germany’s biggest airline millions of euros.
Lufthansa is currently trying to cut costs by 1.5 billion euros as it faces rising fuel costs and increased competition.