Ryanair boss Michael O'Leary is to appear before the Oireachtas Joint Committee on Transport next week to give details of its takeover bid for Aer Lingus.
Mr O'Leary will outline to the committee how he intends to keep the airline competitive if the merger is successful and the potential impact it will have on regional airlines and airports.
Aer Lingus has also been invited but has not yet responded.
The airline has rejected Ryanair's bid of €1.40 a share, saying the offer of €750m significantly undervalued its value.