AF 1801 then U2 3812 at Charles de Gaulle
Madrid → Paris → Milan
Timetable, Paris time
21:00AF 1801 from Madrid at the gate
18:35U2 3812 to Milan leaves the gate
21 h 35 apart on the timetable, overnight
U2 3812 leaves 21 h 35 after AF 1801 arrives on the timetable: more than half a day, so not a connection we count.