I would assume the Aer Arann Irish domestic services are not included in the Aer Lingus franchaise deal is because the RE brand is relatively well known in Ireland whilst the countries it flies to (Britain & France) it`s brand is NOT well known. That is why the Aer Lingus franchaise will help them. I`m sure the Aer Arann/Aer Lingus Cork-Dublin interline arrangement will extend to all airports it serves in Ireland. i.e. you will be able to book your flight from say Donegal to New York on the Aer Lingus website.