DL 609 then DL 1005 at Atlanta
Cancún → Atlanta → Detroit
Timetable, Atlanta time
10:55DL 609 from Cancún at the gate
08:30DL 1005 to Detroit leaves the gate
21 h 35 apart on the timetable, overnight
DL 1005 leaves 21 h 35 after DL 609 arrives on the timetable: more than half a day, so not a connection we count.