AA 4450 then UA 3751 at O'Hare
Madison → Chicago → Cedar Rapids
Timetable, Chicago time
06:21AA 4450 from Madison at the gate
20:10UA 3751 to Cedar Rapids leaves the gate
13 h 49 apart on the timetable
UA 3751 leaves 13 h 49 after AA 4450 arrives on the timetable: more than half a day, so not a connection we count.