If you're interested in flying business class Aer Lingus, definitely might be worth the trek to Boston. BOS-DUB would be 37.5k Avios in Aer Lingus J (JFK-DUB would be 60k Avios).
You can search Aer Lingus award availability at United.com since they also have a partnership (select the non-stop search option to avoid getting a bunch of *A results with connections that you aren't interested in), then call BA to book.