DL 706 then AA 1138 at Atlanta
Denver → Atlanta → Chicago O'Hare
Timetable, Atlanta time
18:01DL 706 from Denver at the gate
16:46AA 1138 to Chicago O'Hare leaves the gate
22 h 45 apart on the timetable, overnight
AA 1138 leaves 22 h 45 after DL 706 arrives on the timetable: more than half a day, so not a connection we count.