It says it will roster nearly 40 per cent of pilot leave in the first quarter next year, "which removes risk of roster problems recurring next year".
The airline confirmed today that it will fly 25 fewer aircraft this winter, resulting in schedule changes from November 2017 to March 2018.
Discount carriers operate a reduced schedule in the winter low season, and the company will suspend 11 routes as part of the usual adjustment, it said.
That includes flights on its most popular Northern Ireland route, from Belfast International to Gatwick.
Ryanair said last week's 2,100 cancellations would cost it under €25 million and estimates the cost of issuing free flight vouchers to the 400,000 customers affected by today's announcement will cost it another €25 million. Shares of Ryanair rose as much as 3 percent, the biggest gain since before news of the pilot crisis first emerged on September 15.
Customers affected though have been offered a voucher from the airline, but this is highly unlikely to be much compensation for those who now have to make adjustments to their travel plans. We will start a new 12-month leave period on January 1, 2018 in full compliance with European Union regulations and the IAA's requirements.
This sudden decision by the Irish airline will be affecting 400,000 bookings on 18,000 flights.
The cancellations jeopardised the travel plans of 315,000 customers, but has now been forced to more than double the number of passengers affected.
"We sincerely apologise to those customers who have been affected by last week's flight cancellations".
If you have had flights cancelled that were paid for by credit card, and the airline or insurer refuse to pay out, you could try claiming to your card provider under Section 75 of the Consumer Credit Act.
Ryanair said Wednesday slower growth going forward will create "lots of spare aircraft and crews" across its 86 bases this winter.
The airline also announced that it will withdraw its bid from buying Italian airline Alitalia to "eliminate all management distractions".