AA 2237 then DL 2398 at Atlanta
Dallas-Fort Worth → Atlanta → New York JFK
Timetable, Atlanta time
20:40AA 2237 from Dallas-Fort Worth at the gate
15:16DL 2398 to New York JFK leaves the gate
18 h 36 apart on the timetable, overnight
DL 2398 leaves 18 h 36 after AA 2237 arrives on the timetable: more than half a day, so not a connection we count.