cheapest way to get to ireland from the us?

I'm actually just returning from a trip to Dublin, it was fucking great. Me and my girlfriend got a wild deal on tickets for companion charges or whatever. Is it just you making the journey? I suggest going with other people, might cut the costs. Good luck!
 
im checkin flights now...
icelandair is the cheapest ive found. (407 dollars, both for one-way and roundtrip. sick!) cheapest from jfk or boston to london or manchester or glasgow, then one could just take the ferry to ireland which would be around 60 euros, or less if they manage to hitch on to the ferry.
heres a link to icelandair dealz yo
http://www.icelandair.us/destinations/flights/item20572/flights-to-glasgow