AZ 1682 then U2 1684 at Fiumicino
Firenze → Rome → Nice
Timetable, Rome time
16:25AZ 1682 from Firenze at the gate
09:05U2 1684 to Nice leaves the gate
16 h 40 apart on the timetable, overnight
U2 1684 leaves 16 h 40 after AZ 1682 arrives on the timetable: more than half a day, so not a connection we count.