AA 4504 then DL 4661 at O'Hare
South Bend → Chicago → Little Rock
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
15:40DL 4661 to Little Rock leaves the gate
21 h 05 apart on the timetable, overnight
DL 4661 leaves 21 h 05 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.