DL 641 then DL 2735 at Atlanta
Cancún → Atlanta → Hartford
Timetable, Atlanta time
16:25DL 641 from Cancún at the gate
15:40DL 2735 to Hartford leaves the gate
23 h 15 apart on the timetable, overnight
DL 2735 leaves 23 h 15 after DL 641 arrives on the timetable: more than half a day, so not a connection we count.