Airport operators Fraport and airline Lufthansa are seeking a high court injunction to stop air traffic controllers joining in a strike at Frankfurt airport.
The air traffic controllers have been urged to walk out in solidarity.
If they do support the strike and stop work for six hours, 300 flights could be cancelled.
Some are losing patience with groundstaff demands, such as one man at the airport who said: “I find what they do completely exaggerated. They earn a lot of money and in the end it’s the passengers who bear the consequences of the strike.”
Another woman in Frankfurt thought what the workers are asking for is excessive.
“I fear that the entire airport in Frankfurt will be a bit paralysed. I think the demands of the staff on strike are utopian. I think it’s not right – what they’re asking for is too much,” she said.
There have been nearly two weeks of disruption to domestic and short haul flights at Europe’s third busiest airport, as the ground workers who guide the planes press for a 70 per cent increase in their salaries.