FR 4855 then IB 648 at Fiumicino
Catania → Rome → Madrid
Timetable, Rome time
19:35FR 4855 from Catania at the gate
12:00IB 648 to Madrid leaves the gate
16 h 25 apart on the timetable, overnight
IB 648 leaves 16 h 25 after FR 4855 arrives on the timetable: more than half a day, so not a connection we count.