Mr O'Leary has announced a relaxing of bag restrictions for passengers as well as reduction in baggage charges and an easing of booking conditions.
This and other changes will cover the period up to the end of March 2014, so it remains to be seen if the relaxation of restrictions will carry on into the busy summer 2014 months.
From December 1, Ryanair will allow passengers to take a second small carry-on bag no bigger than 35cm x 20cm x 20cm, which will allow a bottle of wine or equivalent to be carried.
From January 5, Ryanair's standard airport bag charge will be cut from £60 to £30 at the bag drop desk, and from £60 to £50 at the boarding gate, bringing them into line with competitor airline standard airport bag fees.
Mr O'Leary said: "We are very excited at these significant improvements. We are listening and responding to our customers."