AA 4424 then UA 3751 at O'Hare
Grand Rapids → Chicago → Cedar Rapids
Timetable, Chicago time
06:14AA 4424 from Grand Rapids at the gate
20:10UA 3751 to Cedar Rapids leaves the gate
13 h 56 apart on the timetable
UA 3751 leaves 13 h 56 after AA 4424 arrives on the timetable: more than half a day, so not a connection we count.