Thousands of Ryanair passengers faced travel disruption Wednesday as German pilots and cabin crew walked off the job, in the latest flare-up of a bitter Europe-wide battle for better pay and conditions.
According to Press TV, the Irish budget carrier said it was canceling 150 out of 400 scheduled flights to and from Germany because of the walkout, which it slammed as "unacceptable" and "unnecessary."
It also said it may have to close some bases and slash jobs if the stoppages drag on.
Germany's Cockpit pilots' federation and the Verdi service workers' union called the 24-hour strike, which started at 03:00 a.m. local time (01:00 GMT), after they said talks with Ryanair management were deadlocked.
The strike comes as Ryanair is already bracing for a mass coordinated walkout by cabin crew in Belgium, Italy, the Netherlands, Portugal, and Spain.
Union leaders are expected to announce details of the stoppage in Brussels on Thursday.
They have vowed to stage "the biggest strike action the company has ever seen."
Ryanair has been clashing with worker representatives ever since it took the unprecedented step last year to start recognizing trade unions in a bid to avert widespread Christmas strikes.
Last month, Ryanair pilots in five European countries, including Germany, held their first-ever simultaneous walkout, causing some 400 flight cancelations and travel chaos for 55,000 passengers.
Ryanair has however made some progress in clinching collective labor agreements since then.
The 33-year-old company managed to strike a deal with Italian pilots over working conditions in late August, its first-ever union agreement.
In Ireland, pilots voted to accept an agreement on improved working conditions last week.
The breakthrough prompted Ryanair to back down from an earlier threat that it would move several aircraft and 300 jobs from Ireland to Poland.
Germany's Cockpit and Verdi unions, which represent some 400 Germany-based Ryanair pilots and 1,000 flight personnel, condemned the airline's attempt to squeeze them with a similar threat.
"This is how Ryanair deals with its employees: putting pressure on them, scaring them and threatening job losses," Cockpit's Vice President Markus Wahl told AFP.
Ryanair's Chief Marketing Officer Kenny Jacobs said on Tuesday that further strikes would damage Ryanair's business in Germany and "lead to base cuts and job cuts."
"We are not making a threat," he told a Frankfurt press conference. "If you have ongoing strikes, that's the economic impact."