AA 2065 then UA 3751 at O'Hare
San Diego → Chicago → Cedar Rapids
Timetable, Chicago time
04:49AA 2065 from San Diego at the gate
20:10UA 3751 to Cedar Rapids leaves the gate
15 h 21 apart on the timetable
UA 3751 leaves 15 h 21 after AA 2065 arrives on the timetable: more than half a day, so not a connection we count.