The spat between Ryanair and Mr Ryan has lasted for weeks. Mr Ryan has rejected claims by the Ryanair boss, saying he cannot intervene in a planning process currently in front of Fingal and characterised the communications with Mr O’Leary as “personalised, inaccurate, and inflammatory”.

However, in a media briefing on Thursday, Mr O’Leary widened the attack to Green Party government ministers, brandishing cardboard mock-ups of Mr Ryan and Ms Martin, the tourism minister, both wearing dunces hats.

In pointed attacks on the Green Party ministers, he told reporters he wants the Government to back emergency legislation to recognise Dublin Airport as “a piece national infrastructure” whose future should not be in the hands of “local loonies”.

Mr O’Leary said that Ryanair will be prevented from growing at Dublin but faces no such restrictions at Shannon, Cork, and Knock airports.

Mr O’Leary denied that his verbal broadsides are part of any international agenda that is pushing back against climate change policies. “It is not an anti-green agenda,” he said. “Nobody does more than Ryanair to promote the green agenda," he said.

He said it just happened that both ministers he was questioning were Green Party ministers.

Mr O'Leary insisted that his call for emergency legislation to lift the cap was credible, saying that the Oireachtas was able to rush through emergency laws during the banking crisis over a decade ago.

It is not the first that the Ryanair chief has clashed with an Irish government minister. Mary O’Rourke, Seamus Brennan, as well as officials have been the subject of his verbal broadsides.

In 2004, Mr O’Leary took out full-page newspaper ads attacking former taoiseach Bertie Ahern over his alleged failure to break up the then State airport company, Aer Rianta.

Mr Ahern at the time said that if Mr O’Leary was still at school he could be described as a bully. Mr O’Leary in turn responded that Mr Ahern was being bullied by trade unions at Dublin Airport.

In 2014, Mr O'Leary announced plans to increase jobs and capacity at Dublin Airport after the coalition scrapped plans to introduce a passenger tax on airlines. At a press conference at Ryanair's north Dublin head offices at the time, then taoiseach Enda Kenny and former finance minister Michael Noonan sat side by side with former finance minister Charlie McCreevy, who was then a non-executive director on the Ryanair board, to endorse the growth plans.

Mr O'Leary on Thursday predicted that fares are going to increase this summer by between 5% to 10%, but added that the fares could either fall or rise further depending on the war in the Middle East, he said.

He said that Ryanair will take 10 fewer new planes from Boeing by this summer because of the production turmoil facing the US plane maker after regulators intervened following the blowout of an airborne Boeing Max 9 plane above Portland in Oregon in January.

He said that the Boeing delays will lead to Ryanair cutting back frequencies this summer, including at Dublin Airport.

Ryanair has still a good relationship with Boeing despite having to deal with “management speak” from the plane maker amid its current challenges with regulators, he said.

“Boeing is in the eye of the storm at the moment,” he said, but insisting that Airbus faces “a greater challenge” over its aircraft.

Ryanair is one of the largest customers in the world for Boeing.

Ryanair has also placed one of the world's largest orders for the still-to-be-certified Max 10 planes. The airline hopes to start taking delivery of some of the massive order starting in about 36 months. Last May, it said it had ordered 300 new Max 10 planes worth over $40bn (€36.5bn).

The deal includes a firm commitment for 150 of the planes and an option for 150 more, with the first planes due for delivery from 2027.

Mr O’Leary said on Thursday that he still expected the Max 10 plane to get its certification this year or in the early part of 2025 but that the orders were crucial to the growth plans of Ryanair for years to come.

On the Gaza war, Mr O’Leary was asked whether as chief of Europe’s largest airline, he should speak about the war given his interventions in hot political issues abroad in the past, including ahead of the Brexit referendum in the UK in 2016.

He said that Ryanair operated flights out of Tel Aviv carrying both Israelis and Palestinians.

Ryanair wanted a ceasefire and the release of the hostages held by Hamas and the airline also wants to get Russian military forces out of Ukraine, he said..

Ryanair said earlier this week said it wanted Ben Gurion International Airport to reopen its Terminal 1 for the airline to start flying again into Tel Aviv.

Ryanair resumed daily flights to Tel Aviv at the start of the month but said that the airport had since insisted it use the more expensive Terminal 3. It again terminated its flights into Tel Aviv from Tuesday which it said was forced on it because it was forced to charge significantly more for its fares.

Mr O'Leary on Thursday said that Ryanair had agreed plans with Ukraine to restore flights once the air restrictions for civil aircraft were lifted.