AA 6299 then UA 3751 at O'Hare
Flint → Chicago → Cedar Rapids
Timetable, Chicago time
06:59AA 6299 from Flint at the gate
20:10UA 3751 to Cedar Rapids leaves the gate
13 h 11 apart on the timetable
UA 3751 leaves 13 h 11 after AA 6299 arrives on the timetable: more than half a day, so not a connection we count.