AZ 633 then FR 4891 at Fiumicino
Miami → Rome → Catania
Timetable, Rome time
15:10AZ 633 from Miami at the gate
12:15FR 4891 to Catania leaves the gate
21 h 05 apart on the timetable, overnight
FR 4891 leaves 21 h 05 after AZ 633 arrives on the timetable: more than half a day, so not a connection we count.