DL 2925 then DL 2879 at Atlanta
Mobile → Atlanta → Chicago O'Hare
Timetable, Atlanta time
20:35DL 2925 from Mobile at the gate
17:45DL 2879 to Chicago O'Hare leaves the gate
21 h 10 apart on the timetable, overnight
DL 2879 leaves 21 h 10 after DL 2925 arrives on the timetable: more than half a day, so not a connection we count.