AF 489 then U2 3818 at Charles de Gaulle
Fortaleza → Paris → Milan
Timetable, Paris time
10:25AF 489 from Fortaleza at the gate
17:10U2 3818 to Milan leaves the gate
6 h 45 apart on the timetable
Charles de Gaulle’s board gives an arrival time for only about 57% of its flights, so many days show no gate time.
The last days
AF 489 and U2 3818 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.