KE 33 then DL 9960 at Atlanta
Seoul → Atlanta → New York LaGuardia
Timetable, Atlanta time
08:15KE 33 from Seoul at the gate
06:00DL 9960 to New York LaGuardia leaves the gate
21 h 45 apart on the timetable, overnight
DL 9960 leaves 21 h 45 after KE 33 arrives on the timetable: more than half a day, so not a connection we count.