AA 9928 then DL 1084 at O'Hare
New York LaGuardia → Chicago → Detroit
Timetable, Chicago time
06:45AA 9928 from New York LaGuardia at the gate
19:15DL 1084 to Detroit leaves the gate
12 h 30 apart on the timetable
DL 1084 leaves 12 h 30 after AA 9928 arrives on the timetable: more than half a day, so not a connection we count.