DL 5161 then DL 1139 at Atlanta
Montgomery → Atlanta → Chicago O'Hare
Timetable, Atlanta time
20:35DL 5161 from Montgomery at the gate
19:35DL 1139 to Chicago O'Hare leaves the gate
23 h apart on the timetable, overnight
DL 1139 leaves 23 h after DL 5161 arrives on the timetable: more than half a day, so not a connection we count.