Mr O'Leary believes it is driving job growth away from Dublin.
The head of Ryanair has called out the Transport Minister over the passenger cap at Dublin Airport.
Mullingar's Michael O'Leary is describing it as absurd and says the cap is now diverting traffic, tourism and jobs growth away from the capital to other UK and EU competitor airports.
He says claims Eamon Ryan can't intervene in the planning process are untrue, accusing the Green Party leader of showing no restraint in regards to the MetroLink project.