AZ 343 then FR 4891 at Fiumicino
Nice → Rome → Catania
Timetable, Rome time
12:30AZ 343 from Nice at the gate
12:15FR 4891 to Catania leaves the gate
23 h 45 apart on the timetable, overnight
FR 4891 leaves 23 h 45 after AZ 343 arrives on the timetable: more than half a day, so not a connection we count.