AF 6740 then UA 3876 at O'Hare
Paris Charles de Gaulle → Chicago → Miami
Timetable, Chicago time
23:40AF 6740 from Paris Charles de Gaulle at the gate
21:00UA 3876 to Miami leaves the gate
21 h 20 apart on the timetable, overnight
UA 3876 leaves 21 h 20 after AF 6740 arrives on the timetable: more than half a day, so not a connection we count.