By Catherine Hardy with REUTERS
Ryanair shares fell 3 percent in early Monday trading following its announcement late on Friday of plans to cancel between 40 and 50 flights a day until the end of October.
The company says it is trying to deal with a backlog of staff leave which must be allocated before the end of the year.
If the airline cancels 40 flights a day for six weeks, an estimated 285,000 journeys will be affected.
Ryanair has described the situation as “unacceptable” to customers.