O'Leary stated during a press conference in Rome that Ryanair will take delivery of 35 Boeing aircraft by the end of June and an additional five during the first two weeks of July.
Ryanair said in March that although the business was originally scheduled to receive 57 Boeing Max 8200 planes by the end of April, a developing crisis at Boeing meant it would only deliver 40 jets before the end of June.
In addition, O'Leary stated that despite recent regulatory conflicts, he anticipated Ryanair to maintain its dominant position in the Italian market in the years to come.
According to O'Leary, the budget airline based in Dublin would be interested in taking up any slots that might open up at Rome's Fiumicino airport as a consequence of Lufthansa and ITA Airways' proposed merger.
He stated that a disagreement Ryanair had with businesses, such as the Spanish online travel firm eDreams, was the reason for the airline's confrontation with Italy's antitrust regulator (AGCM) this week.
Ryanair has been directed by the AGCM to cease restricting or preventing travel agencies from selling its airline tickets.
O'Leary, who had attended holding a placard that said, "Stop OTA (Online Travel Agency) Pirates, Protect Passengers," stated, "We think the case has no merit whatsoever."
Ryanair declared that it would challenge any final AGCM decision that went against it in an Italian provincial court, where it knows it will prevail.
The business also intends to file a countercomplaint with the AGCM about O'Leary's allegations that eDreams' Prime membership service paid travellers an annual fee of €55 for nonexistent savings.
eDreams responded by praising the AGCM action and criticising Ryanair's handling of it.
"Such aggressive and bullying behaviour is aimed at deflecting scrutiny from their own questionable actions and underscores their anti-competitive culture," the company stated in a statement.