AF 1579 then U2 3816 at Charles de Gaulle
Napoli → Paris → Milan
Timetable, Paris time
08:40AF 1579 from Napoli at the gate
14:20U2 3816 to Milan leaves the gate
5 h 40 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 1579 and U2 3816 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.