AA 2983 then DL 2398 at Atlanta
Philadelphia → Atlanta → New York JFK
Timetable, Atlanta time
20:21AA 2983 from Philadelphia at the gate
15:16DL 2398 to New York JFK leaves the gate
18 h 55 apart on the timetable, overnight
DL 2398 leaves 18 h 55 after AA 2983 arrives on the timetable: more than half a day, so not a connection we count.