AA 6486 then UA 4436 at O'Hare
Detroit → Chicago → Springfield Branson National
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
12:45UA 4436 to Springfield Branson National leaves the gate
19 h 16 apart on the timetable, overnight
UA 4436 leaves 19 h 16 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.