AA 4504 then UA 4465 at O'Hare
South Bend → Chicago → Cedar Rapids
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
16:10UA 4465 to Cedar Rapids leaves the gate
21 h 35 apart on the timetable, overnight
UA 4465 leaves 21 h 35 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.