AZ 79 then FR 4852 at Fiumicino
Barcelona → Rome → Catania
Timetable, Rome time
18:35AZ 79 from Barcelona at the gate
13:55FR 4852 to Catania leaves the gate
19 h 20 apart on the timetable, overnight
FR 4852 leaves 19 h 20 after AZ 79 arrives on the timetable: more than half a day, so not a connection we count.