AA 4622 then UA 3751 at O'Hare
Louisville → Chicago → Cedar Rapids
Timetable, Chicago time
07:15AA 4622 from Louisville at the gate
20:10UA 3751 to Cedar Rapids leaves the gate
12 h 55 apart on the timetable
UA 3751 leaves 12 h 55 after AA 4622 arrives on the timetable: more than half a day, so not a connection we count.