AZ 641 then FR 4904 at Fiumicino
San Francisco → Rome → Palermo
Timetable, Rome time
12:15AZ 641 from San Francisco at the gate
07:50FR 4904 to Palermo leaves the gate
19 h 35 apart on the timetable, overnight
FR 4904 leaves 19 h 35 after AZ 641 arrives on the timetable: more than half a day, so not a connection we count.