FR 166 then FR 4858 at Fiumicino
Beauvais → Rome → Catania
Timetable, Rome time
15:40FR 166 from Beauvais at the gate
09:25FR 4858 to Catania leaves the gate
17 h 45 apart on the timetable, overnight
FR 4858 leaves 17 h 45 after FR 166 arrives on the timetable: more than half a day, so not a connection we count.