A good fare deal is happening for San Francisco or San Jose to Rome with lowest fares on Star Alliance, followed by Oneworld and SkyTeam for travel departures from February into mid-June. There are also discount fares to Naples and Sicily airports in low $500s.
This deal is only available on very limited dates from LAX.
Momondo.com search and TravelMerry.com OTA ticket
Star Alliance (United) San Francisco SFO – Washington IAD – Brussels BRU – Rome FCO – (Swiss) Zurich ZRH – SFO
Watch out for seat fees with Swiss Airlines ($29 on transatlantic flight). You can fly United and Air Canada for $7 more.
San Jose SJC – London LHR – Rome FCO – LHR – SJC