...the big question really is which is your preferred destination, Shannon or Dublin since you're just going to be here for approx a wk.
PHL-SNN is the most obviously direct route but if you have to depart NY, then JFK-IAD-PHL-DUB is all on UA metal ... unfortunately it isn'e available as an option on 9/ll but is on 9/10 and at least that gets you to Irl ON the 11th!!! Start hols a day early?!? Hope the 1K staff start working with you on this and that you get to come to Ireland.