The DAA says growth at Shannon has hurt Cork Airport.
The DAA's annual results show traffic at Cork Airport declined by 5% last year to 2.1 milion passengers, and officials says this is "due largely" to the transfer of a number of central European routes being transferred to Shannon.
Last year, the independent Shannon reported passenger growth of 17%.
The DAA says restoring growth to Cork is one of its priorities.
A number of TDs, including Fianna Fáil leader Micheál Martin, have said current government policy which keeps Cork under DAA control is hurting growth there.