AA 4381 then UA 3751 at O'Hare
Grand Rapids → Chicago → Cedar Rapids
Timetable, Chicago time
06:09AA 4381 from Grand Rapids at the gate
20:10UA 3751 to Cedar Rapids leaves the gate
14 h 01 apart on the timetable
UA 3751 leaves 14 h 01 after AA 4381 arrives on the timetable: more than half a day, so not a connection we count.