AA 660 then DL 4677 at Detroit
Dallas-Fort Worth → Detroit → Chicago Midway
Timetable, Detroit time
18:34AA 660 from Dallas-Fort Worth at the gate
17:40DL 4677 to Chicago Midway leaves the gate
23 h 06 apart on the timetable, overnight
DL 4677 leaves 23 h 06 after AA 660 arrives on the timetable: more than half a day, so not a connection we count.