AF 7531 then U2 4501 at Charles de Gaulle
Rennes → Paris → Nice
Timetable, Paris time
12:10AF 7531 from Rennes at the gate
06:55U2 4501 to Nice leaves the gate
18 h 45 apart on the timetable, overnight
U2 4501 leaves 18 h 45 after AF 7531 arrives on the timetable: more than half a day, so not a connection we count.