Ryanair have released a full list of cancelled flights up to the end of October

You may want to check to see if you're planned flight is on this list.

We had already received the information on the cancelled flights up to Wednesday 20 September, and these new details run from Monday 25 September to Saturday 28 October. Cancelled flight details for Thurs 21 September to Sunday 24 September are still to be disclosed. The full dates, times and flight numbers of the rest of the cancellations can be found here. There are multiple flights to and from Ireland to be found on most of the days of cancellations.

The full list of cancelled flights is here: https://t.co/g9YyVNtWoZ. We apologise to all affected customers & are working hard to fix this

— Ryanair (@Ryanair) September 18, 2017

As per Ryanair's website statement:

Up to 50 flights per day (less than 2% of flights) have been cancelled for the next six weeks. Your flight is operating as usual unless you receive an email.

The reason given for this was so that their work calendar could successfully switch from April-March to January-December, as well as a backlog of crew leave which must be handed out before the end of the year. However, news of a mass exodus of their pilots to a rival airline that is setting up in Dublin may prove to also be a big factor in the cancellations. According to The Guardian, Norwegian Air stated that: "We can confirm that 140 pilots have joined Norwegian from Ryanair this year. Pilot recruitment is also under way for more pilots for our new Dublin base opening later this year."