AA 1652 then UA 3751 at O'Hare
Philadelphia → Chicago → Cedar Rapids
Timetable, Chicago time
07:27AA 1652 from Philadelphia at the gate
20:10UA 3751 to Cedar Rapids leaves the gate
12 h 43 apart on the timetable
UA 3751 leaves 12 h 43 after AA 1652 arrives on the timetable: more than half a day, so not a connection we count.