Mr Walsh went on: "The Gatwick proposals, which will result in a significant increase in charges, are completely unjustifiable, totally unacceptable and directly contravene the CAA's new remit to represent customers' interests.
"The CAA must not be allowed to fail again. In line with its new remit, (CAA chairman) Dame Deirdre Hutton and the CAA board should protect customers and ensure that they get a better deal.
"We will make strong representations to Dame Deirdre and the board to reconsider this proposal."
Willie Walsh the chief executive of IAG - the parent company of British Airways - prepares for his turn at the controls of a flight simulator to raise money for the Aerobility charity. The event to raise £100,000 pounds is being held at Blackbushe Airport in Camberley.