KL 642 then KL 1617 at Schiphol
New York JFK → Amsterdam → Milan Linate
Timetable, Amsterdam time
06:00KL 642 from New York JFK at the gate
18:45KL 1617 to Milan Linate leaves the gate
12 h 45 apart on the timetable
KL 1617 leaves 12 h 45 after KL 642 arrives on the timetable: more than half a day, so not a connection we count.