Love reading your pre-trip report!! Have you priced out Aer Lingus?? It could be fate: your dreams of Ireland, you step dancing daughter...! Really check it out, I am on the EBTA and MANY MANY of us are returning home on Aer Lingus because they were MUCH cheaper than the other airlines. I know they have flights from New York & Boston via Dublin, but I also think they service Chicago, DC and Atlanta. Several on the EBTA and 1st Med sailing booked tix between $350-600 for the Barcelona to US portion. I booked it later, mid-Feb and was still able to get a flight for $650, and we get two days in Dublin ( by choice )!! We do live about an hour from Boston - so we do not have to find another flight once we hit the US, but maybe you could find an OK deal??
Actually ...YOU should be able to get a better deal because you will be doing a roundtrip. We got nailed because it was only a one way! i think they were running a spring sale on roundtrips, starting in US, very recently. I didnt pay too much attention because I didnt qualify for the rate.