Alitalia just recently published some Fall and Winter Sales to Italy.

Your ticket must be purchased by September 28, 2011

Sample fares for Autumn Travel - travel between Sept 20 to Oct 28, 2011
New York - Milan from $ 802 RT, taxes and fees included
Boston - Rome from $ 903 RT, taxes and fees included

Look at the savings below if you want to defer your travel to the winter

Sample fares for Winter Travel - travel between Oct 29, 2011 and Mar 26, 2012
New York - Milan from $ 752 RT, taxes and fees included
Boston - Rome from $ 803 RT, taxes and fees included

Note there are some blackout periods, and a 7 day advance purchase is required.
Call them for more information:  Toll Free (USA) 1-800-223-5730 | UK: tel 08714 241 424