AA 4697 then DL 9960 at Atlanta
Washington National → Atlanta → New York LaGuardia
Timetable, Atlanta time
10:24AA 4697 from Washington National at the gate
06:00DL 9960 to New York LaGuardia leaves the gate
19 h 36 apart on the timetable, overnight
DL 9960 leaves 19 h 36 after AA 4697 arrives on the timetable: more than half a day, so not a connection we count.