Emirates Airlines has a 4-day sale with ticket prices at $497 round trip New York JFK to Milan, Italy MXP for nonstop flights. Several airlines match these fares for one stop flights, including American, Delta and Alitalia. Star Alliance member TAP Portugal has even lower $420 to $450 round trip ticket prices.
Low fare dates April-May, Sep-Feb 2018.
These flights are bookable via Google Flights. Lower prices might be found through Momondo.com.
Emirates New York JFK – Milan MXP – New York JFK nonstop
TAP Portugal Newark EWR – Lisbon LIS – Milan MXP – Lisbon LIS (23.5 hour overnight transit layover) – Newark EWR