DL 2956 then DL 9970 at Atlanta
Philadelphia → Atlanta → Los Angeles
Timetable, Atlanta time
17:53DL 2956 from Philadelphia at the gate
17:01DL 9970 to Los Angeles leaves the gate
23 h 08 apart on the timetable, overnight
DL 9970 leaves 23 h 08 after DL 2956 arrives on the timetable: more than half a day, so not a connection we count.