FR 1815 then AZ 1733 at Fiumicino
Porto → Rome → Catania
Timetable, Rome time
20:40FR 1815 from Porto at the gate
17:15AZ 1733 to Catania leaves the gate
20 h 35 apart on the timetable, overnight
AZ 1733 leaves 20 h 35 after FR 1815 arrives on the timetable: more than half a day, so not a connection we count.