AF 61 then U2 4525 at Charles de Gaulle
Boston → Paris → Nice
Timetable, Paris time
07:05AF 61 from Boston at the gate
19:30U2 4525 to Nice leaves the gate
12 h 25 apart on the timetable
U2 4525 leaves 12 h 25 after AF 61 arrives on the timetable: more than half a day, so not a connection we count.