AA 3732 then DL 2398 at Atlanta
Washington National → Atlanta → New York JFK
Timetable, Atlanta time
19:55AA 3732 from Washington National at the gate
15:16DL 2398 to New York JFK leaves the gate
19 h 21 apart on the timetable, overnight
DL 2398 leaves 19 h 21 after AA 3732 arrives on the timetable: more than half a day, so not a connection we count.