UA 3874 then CV 1 at O'Hare
Chicago Rockford → Chicago → Indianapolis
Timetable, Chicago time
01:21UA 3874 from Chicago Rockford at the gate
17:55CV 1 to Indianapolis leaves the gate
16 h 34 apart on the timetable
CV 1 leaves 16 h 34 after UA 3874 arrives on the timetable: more than half a day, so not a connection we count.