Politicians in the North are vowing to do whatever they can to get Aer Lingus to choose Belfast Airport as its new British hub.
Aer Lingus is deciding whether to locate the hub in Belfast or Birmingham.
DUP MP Jeffrey Donaldson says the move could bring 1,000 jobs and 15 new European routes to Belfast, as well as the possibility of a reinstated link to Heathrow.
He says the investment would be a resounding vote of confidence in the new political arrangements and the DUP is ready to help in any way it can.