FR 4855 then DL 183 at Fiumicino
Catania → Rome → New York JFK
Timetable, Rome time
19:35FR 4855 from Catania at the gate
11:45DL 183 to New York JFK leaves the gate
16 h 10 apart on the timetable, overnight
DL 183 leaves 16 h 10 after FR 4855 arrives on the timetable: more than half a day, so not a connection we count.