FR 4855 then W4 6047 at Fiumicino
Catania → Rome → Porto
Timetable, Rome time
17:10FR 4855 from Catania at the gate
11:50W4 6047 to Porto leaves the gate
18 h 40 apart on the timetable, overnight
W4 6047 leaves 18 h 40 after FR 4855 arrives on the timetable: more than half a day, so not a connection we count.