AA 4504 then DL 1622 at O'Hare
South Bend → Chicago → Detroit
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
08:29DL 1622 to Detroit leaves the gate
13 h 54 apart on the timetable, overnight
DL 1622 leaves 13 h 54 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.