DL 2925 then DL 1939 at Atlanta
Mobile → Atlanta → Cancún
Timetable, Atlanta time
20:35DL 2925 from Mobile at the gate
18:29DL 1939 to Cancún leaves the gate
21 h 54 apart on the timetable, overnight
DL 1939 leaves 21 h 54 after DL 2925 arrives on the timetable: more than half a day, so not a connection we count.