F9 1147 then DL 2398 at Atlanta
Philadelphia → Atlanta → New York JFK
Timetable, Atlanta time
19:54F9 1147 from Philadelphia at the gate
15:16DL 2398 to New York JFK leaves the gate
19 h 22 apart on the timetable, overnight
DL 2398 leaves 19 h 22 after F9 1147 arrives on the timetable: more than half a day, so not a connection we count.