W4 6048 then FR 4861 at Fiumicino
Porto → Rome → Catania
Timetable, Rome time
18:20W4 6048 from Porto at the gate
12:50FR 4861 to Catania leaves the gate
18 h 30 apart on the timetable, overnight
FR 4861 leaves 18 h 30 after W4 6048 arrives on the timetable: more than half a day, so not a connection we count.