UA 3874 then AA 3385 at O'Hare
Chicago Rockford → Chicago → Cedar Rapids
Timetable, Chicago time
01:21UA 3874 from Chicago Rockford at the gate
16:00AA 3385 to Cedar Rapids leaves the gatealso UA 5544
14 h 39 apart on the timetable
AA 3385 leaves 14 h 39 after UA 3874 arrives on the timetable: more than half a day, so not a connection we count.