DL 1866 then DL 9970 at Atlanta
Monterrey → Atlanta → Los Angeles
Timetable, Atlanta time
17:11DL 1866 from Monterrey at the gate
17:01DL 9970 to Los Angeles leaves the gate
23 h 50 apart on the timetable, overnight
DL 9970 leaves 23 h 50 after DL 1866 arrives on the timetable: more than half a day, so not a connection we count.