BA 310 then U2 3814 at Charles de Gaulle
London Heathrow → Paris → Milan
Timetable, Paris time
15:15BA 310 from London Heathrow at the gate
08:35U2 3814 to Milan leaves the gate
17 h 20 apart on the timetable, overnight
U2 3814 leaves 17 h 20 after BA 310 arrives on the timetable: more than half a day, so not a connection we count.