DL 597 then DL 1892 at Atlanta
Cancún → Atlanta → Chattanooga
Timetable, Atlanta time
17:39DL 597 from Cancún at the gate
14:30DL 1892 to Chattanooga leaves the gate
20 h 51 apart on the timetable, overnight
DL 1892 leaves 20 h 51 after DL 597 arrives on the timetable: more than half a day, so not a connection we count.