AA 642 then DL 1147 at O'Hare
Dallas-Fort Worth → Chicago → Atlanta
Timetable, Chicago time
13:10AA 642 from Dallas-Fort Worth at the gate
11:35DL 1147 to Atlanta leaves the gate
22 h 25 apart on the timetable, overnight
DL 1147 leaves 22 h 25 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.