DL 706 then AA 2910 at Atlanta
Denver → Atlanta → Chicago O'Hare
Timetable, Atlanta time
21:24DL 706 from Denver at the gate
15:15AA 2910 to Chicago O'Hare leaves the gate
17 h 51 apart on the timetable, overnight
AA 2910 leaves 17 h 51 after DL 706 arrives on the timetable: more than half a day, so not a connection we count.