Aer Lingus has announced that it will transfer its Dublin Airport operation to Terminal Two when the new terminal opens in November.
However, the company warned it would review the decision if differential pricing is introduced to T2.
Aer Lingus's move will mean that passengers will be able to avail of the US Customs and Border Protection facility.
These facilities are already in operation in Shannon Airport and will allow departing passengers to the US to fully clear US immigration, customs and agriculture controls.
Meanwhile, Aer Lingus has confirmed that it is to transfer operations from its head office building to Hangar 6.
The DAA is to pay Aer Lingus €10.55m over ten years for the leasehold interest on the head office site, it will also provide services and facilities to the value of €11.6m to Aer Lingus over the same period, bringing the total value of the deal to €22.05m.
