Originally Posted by mccartje

I think about €25-30. But you will need to call EI to add the additional item I reckon. Find the EI PNR if you can (begins with a "2"). If you access the flight online via Aer Lingus website it will likely say you have no baggage allowance but this is a glitch and you will have 20kg included but trying to add more online could be problematic. Calling EI is a bit of a lottery at the moment but likely the only way.

No OW benefits on EI.