AA 6325 then QR 8187 at O'Hare
Detroit → Chicago → Houston
Timetable, Chicago time
22:00AA 6325 from Detroit at the gate
16:40QR 8187 to Houston leaves the gate
18 h 40 apart on the timetable, overnight
QR 8187 leaves 18 h 40 after AA 6325 arrives on the timetable: more than half a day, so not a connection we count.