AF 7303 then U2 3812 at Charles de Gaulle
Nice → Paris → Milan
Timetable, Paris time
12:50AF 7303 from Nice at the gate
10:45U2 3812 to Milan leaves the gate
21 h 55 apart on the timetable, overnight
U2 3812 leaves 21 h 55 after AF 7303 arrives on the timetable: more than half a day, so not a connection we count.