AZ 1794 then U2 1684 at Fiumicino
Palermo → Rome → Nice
Timetable, Rome time
20:20AZ 1794 from Palermo at the gate
14:45U2 1684 to Nice leaves the gate
18 h 25 apart on the timetable, overnight
U2 1684 leaves 18 h 25 after AZ 1794 arrives on the timetable: more than half a day, so not a connection we count.