AA 6486 then DL 1940 at O'Hare
Detroit → Chicago → Salt Lake City
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
14:03DL 1940 to Salt Lake City leaves the gate
20 h 34 apart on the timetable, overnight
DL 1940 leaves 20 h 34 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.