MADRID (AP) -- Cabin crew workers for low-cost airline Ryanair went on strike Wednesday in four European countries over working conditions, forcing thousands of passengers to make last-minute travel adjustments at the peak of the summer holiday season.
Labour unions in Portugal, Spain, Belgium and Italy claim that employees are hired by Ryanair or its subsidiaries under contracts governed by countries where they are not based, reducing their leave allowances, causing wage disparities and impeding the workers' access to state benefits.
In response, the Dublin-based airline published on its website salary slips for June, arguing that pilots and cabin crew are fairly paid in Portugal, Spain and Belgium, the three countries most affected.
The company says that all 50,000 customers affected by the cancellation of 600 flights on Wednesday and Thursday were given alternative flights or offered full refunds in past days.
But for Chiara Luchi, a 21-year-old student ending on Thursday a week of holiday with her father in Madrid, her return to Pisa, Italy, became a nightmare. Her flight was still on schedule early Thursday morning but was cancelled by the time she arrived for check-in at the Madrid airport, where a group of striking Ryanair employees handed out informational brochures reading "Ryanair must change."
"I have sympathy for the workers, but I don't think this is fair for the customers and those who have to travel because they need to work," Luchi said as she queued along with dozens more stranded passengers filing complaints.
After some back and forth, Ryanair offered Luchi and her father to pay the full fare for a flight to Rome with another company.
Spain was the country with most cancellations, with almost one out of four of the company's daily flights halted Wednesday and Thursday.
Authorities in Spain required for the company to ensure all flights to the Balearic and Canary Islands, at least 35 percent of domestic flights and 59 percent of international ones.
USO and Sicpla, the two main unions representing pilots and cabin crews in Spain, said negotiations with Ryanair over the contracts of more than 4,000 cabin crews across Europe had failed.
In Italy, protests were planned at airports where Ryanair operates. The Italian unions said they are seeking a collective contract that recognizes workers' rights and that Ryanair has refused to negotiate with them.
Their demands come as Irish pilots have held rolling strikes that hit bookings and consumer confidence in Ireland, according to Ryanair.
The airline responded Thursday by warning some 100 pilots and 200 cabin crew members that they could lose their jobs as it cuts its Dublin-based aircraft fleet from 30 to 24. The carrier says it wants to focus on growing markets, such as Poland.
Ryanair operates a fleet of over 450 aircraft from 87 bases.