AA 4504 then DL 1716 at O'Hare
South Bend → Chicago → Detroit
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
14:44DL 1716 to Detroit leaves the gate
20 h 09 apart on the timetable, overnight
DL 1716 leaves 20 h 09 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.