The Ryanair CEO stated: "All customers on the affected flights will receive an email highlighting the alternative flights they can transfer to hopefully on the same day".
Des Manning told KCLR Live they've been busy fielding calls about it and thankfully haven't had any of their customers affected yet.
The company promised to publish a full list of the canceled flights by Tuesday, but as of Monday there were only details on canceled flights through Wednesday. "Yes but I would rather damage the reputation of Ryanair by cancelling 2 percent of our flights than significantly delaying 40 percent of our flights", O'Leary said.
Passengers have accused the airline of treating them "appallingly" and demanded it publishes a full list of the flights to be cancelled over the next six weeks.
On Friday, the airline blamed a combination of air traffic control delays, bad weather and a backlog in pilots' and cabin crew holiday for the cancellations.
The carrier's current annual leave year runs from April to March, but it is now transitioning to a January to December schedule from 2018.
Choose an alternative flight - If you still want to travel your airline must find you an alternative.
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It said it was shelving up to 50 flights daily after an error in the planning of pilot holidays. However, this 2% figure could equate to more than a quarter of a million passengers being hit by cancellations in the next six weeks.
"It's also essential that Ryanair release a full list of flights that will be affected so that passengers have as much time as possible to make alternate arrangements". Flights are operating as usual for customers who haven't received emails from the carrier.
Compensation is also only payable if the cancellation is the airline's fault.
You should keep any food, transport or accommodation receipts to use when making a claim for compensation.
Some may also be able to claim compensation depending on several factors.
THE majority of standard travel insurance policies won't cover you for flight cancellations and other costs.
Ryanair boss Michael O'Leary has apologised for the inconvenience caused by a pilot rota blunder which has left hundreds of thousands of passengers unsure whether their flights will take off.