AA 6486 then UA 4765 at O'Hare
Detroit → Chicago → Des Moines
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
12:55UA 4765 to Des Moines leaves the gate
19 h 26 apart on the timetable, overnight
UA 4765 leaves 19 h 26 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.