AZ 345 then FR 4852 at Fiumicino
Nice → Rome → Catania
Timetable, Rome time
16:30AZ 345 from Nice at the gate
06:15FR 4852 to Catania leaves the gate
13 h 45 apart on the timetable, overnight
FR 4852 leaves 13 h 45 after AZ 345 arrives on the timetable: more than half a day, so not a connection we count.