FR 4855 then OS 558 at Fiumicino
Catania → Rome → Vienna
Timetable, Rome time
23:59FR 4855 from Catania at the gate
20:05OS 558 to Vienna leaves the gate
20 h 06 apart on the timetable, overnight
OS 558 leaves 20 h 06 after FR 4855 arrives on the timetable: more than half a day, so not a connection we count.