From San Francisco to Rome for Easter week is as low as $539 round trip for flights with all three alliances priced from $539 to $558.
Travel departure dates: Jan – early May; mid-Aug-Oct 2018.
United Airlines codeshare Air Canada operated flights
SFO – Montreal YUL – Rome FCO – YUL – SFO
SFO – Chicago ORD – Rome FCO – Dallas DFW – SFO