AF 722 then U2 3812 at Charles de Gaulle
Brazzaville → Paris → Milan
Timetable, Paris time
06:15AF 722 from Brazzaville at the gate
10:45U2 3812 to Milan leaves the gate
4 h 30 apart on the timetable
Charles de Gaulle’s board gives an arrival time for only about 51% of its flights, so many days show no gate time.
The last days
AF 722 and U2 3812 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.