Ryanair Boeing 737-800. Photo: Adrian Pingstone.

LONDON — The neverending Ryanair spat with its flight crew in Germany has escalated to all-new levels. The airline has threatened to cut jobs and close bases in that country should its workforce continue striking.

The latest strike, which seeks for better pay and working conditions, is scheduled to happen on September 12.

“These threatened strikes can only damage Ryanair’s business in Germany,” Ryanair’s Chief Marketing Officer Kenny Jacobs said.

“And if they continue, will lead to base cuts and job cuts for both German pilots and cabin crew, particularly at some secondary German bases.”

The strike is expected to involve around 400 of Ryanair’s employees in Germany during a 24-hour walkout.

Jacobs also rejected allegations that the airline is underpaying its staff.

The ULCC carrier responded to this with claims that one of Lufthansa’s subsidiaries, Eurowings. is paying pilots 30% less than Ryanair.

“It is unacceptable that a union representing Ryanair’s German pilots, who earn up to €190,000 a year and work a five-day week followed by a four-day weekend, is now threatening customers travel plans at short notice and without consulting with our German pilots,” added Jacobs.

It is unclear how many flights will be forced to cancel on September 12.

Ryanair has been hit all summer with strikes. In August alone, 400 out of 2,400 scheduled European flights were canceled due to industrial action by pilots in Ireland.

Out of these 400 flights, Germany was hit worst, with 250 flights from 10 airports being scrapped.

The carrier is still fighting with other unions to bring deals to conclusions.

Ryanair managed to avert a Christmas disaster last year when, for the first time in its history, recognized trade unions.