Ryanair has announced to cut its Dublin-based fleet from 30 to 24 floors for the winter 2018 season, putting 300 jobs at risk.
The six aircraft and transfer of the carrier, a Polish charter airline, which he said was growing quickly.
Ryanair blamed a decline in forward bookings and rates in the Republic of Ireland, in part as a result of the recent rolling strikes of Irish pilots.
About 100 pilots and 200 cabin crew has been given 90 days ‘ notice.
The airline has said that their services “may not be required from the 28th October onwards”.
At the beginning of this week, Ryanair, said its profits in the April to June quarter was hit by higher wage costs as the airline faces strikes by staff over pay and conditions.
He said that high oil prices and a reduction in the charges also dented profits, which fell 20% to €319m (£285m).
Ryanair is facing more strikes. The on-board staff, in Spain, Portugal, Belgium and Italy are on Wednesday and Thursday, forcing the cancellation of 600 flights.