DL 1147 then AA 312 at O'Hare
Atlanta → Chicago → Dallas-Fort Worth
Timetable, Chicago time
10:25DL 1147 from Atlanta at the gate
09:59AA 312 to Dallas-Fort Worth leaves the gate
23 h 34 apart on the timetable, overnight
AA 312 leaves 23 h 34 after DL 1147 arrives on the timetable: more than half a day, so not a connection we count.