AZ 1726 then U2 1684 at Fiumicino
Catania → Rome → Nice
Timetable, Rome time
16:50AZ 1726 from Catania at the gate
14:45U2 1684 to Nice leaves the gate
21 h 55 apart on the timetable, overnight
U2 1684 leaves 21 h 55 after AZ 1726 arrives on the timetable: more than half a day, so not a connection we count.