AA 440 then QF 7554 at O'Hare
Houston → Chicago → Dallas-Fort Worth
Timetable, Chicago time
14:29AA 440 from Houston at the gate
13:37QF 7554 to Dallas-Fort Worth leaves the gate
23 h 08 apart on the timetable, overnight
QF 7554 leaves 23 h 08 after AA 440 arrives on the timetable: more than half a day, so not a connection we count.