DL 706 then DL 1728 at Atlanta
Denver → Atlanta → Chicago Midway
Timetable, Atlanta time
18:01DL 706 from Denver at the gate
15:25DL 1728 to Chicago Midway leaves the gate
21 h 24 apart on the timetable, overnight
DL 1728 leaves 21 h 24 after DL 706 arrives on the timetable: more than half a day, so not a connection we count.