Swiss and United have round-trip flights from Los Angeles (LAX) to Rome, Venice, Milan, and Florence (FCO/VCE/MXP/FLR) for $443-$474 with a connection. Flights from November to mid-April.
Note: AA and Oneworld partners are matching most of the Rome FCO flights.
Note: New Years Eve is available if you can do a 11-day stay or longer.
Note: Some small OTAs on Vayama and SkyScanner have this for -$15 cheaper than Priceline. If you plan on booking on Vayama, be aware that they do not honor the Department of Transportation’s guidelines for allowing tickets to be canceled for free within the 24-hours after purchase. Use small OTAs and unknown booking sites at your own risk.
Click for more details and booking links Cheap Flights: Los Angeles to Rome / Venice / Milan / Florence $443-$474 r/t – Swiss / United