AA 6486 then UA 622 at O'Hare
Detroit → Chicago → Austin
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
12:59UA 622 to Austin leaves the gate
19 h 30 apart on the timetable, overnight
UA 622 leaves 19 h 30 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.