F9 1081 then DL 2398 at Atlanta
Washington → Atlanta → New York JFK
Timetable, Atlanta time
20:27F9 1081 from Washington at the gate
15:16DL 2398 to New York JFK leaves the gate
18 h 49 apart on the timetable, overnight
DL 2398 leaves 18 h 49 after F9 1081 arrives on the timetable: more than half a day, so not a connection we count.