AA 6486 then AA 2604 at O'Hare
Detroit → Chicago → Austin
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
13:35AA 2604 to Austin leaves the gate
20 h 06 apart on the timetable, overnight
AA 2604 leaves 20 h 06 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.