AZ 1274 then U2 1684 at Fiumicino
Napoli → Rome → Nice
Timetable, Rome time
20:40AZ 1274 from Napoli at the gate
12:25U2 1684 to Nice leaves the gate
15 h 45 apart on the timetable, overnight
U2 1684 leaves 15 h 45 after AZ 1274 arrives on the timetable: more than half a day, so not a connection we count.