Short-time work is a form of state aid that allows employers to switch employees to shorter working hours during an economic downturn to keep them on the payroll. It has been widely used by industry, including Germany's car sector.

The spokesman said Lufthansa had not yet applied for state aid but was in talks with various banks and authorities about what kind of help would be possible if the airline needed it.

He said around 700 of Lufthansa's roughly 760 planes were currently grounded.

In an interview with weekly magazine Der Spiegel, Lufthansa Chief Executive Carsten Spohr said he expected the global economy to shrink as a result of the crisis, adding globalization might be reversed to a certain extent.

"That's why we are currently running different scenarios for a smaller Lufthansa group. In doing so we're trying to possibly keep all our employees on board," he told the magazine.

"But this will only work with innovative ideas such as comprehensive part time work for all employees."

(Reporting by Klaus Lauer; Additional reporting by Christoph Steitz; Writing by Michelle Martin; Editing by Scot W. Stevenson)