Ryanair is to submit a High Court appeal against a decision by the Aviation Regulator to approve a 50% increase in check-in desk charges at Dublin Airport.
The High Court appeal will also include a recent approval for a charge for automated check-in kiosks at the airport.
The airline says that check-in desk charges have trebled to the current price of €25,000 in three years.
Chief executive Michael O'Leary described the Aviation Regulator as 'a regulatory poodle'.
Commenting on the succession of Brian Cowen as Taoiseach, Mr O'Leary said anyone could do a better job than the outgoing Taoiseach. He said Bertie Ahern had been 'a disaster' for the Irish economy.