DL 5121 then DL 9970 at Atlanta
White Plains → Atlanta → Los Angeles
Timetable, Atlanta time
18:50DL 5121 from White Plains at the gate
17:01DL 9970 to Los Angeles leaves the gate
22 h 11 apart on the timetable, overnight
DL 9970 leaves 22 h 11 after DL 5121 arrives on the timetable: more than half a day, so not a connection we count.