UA 3874 then AA 3341 at O'Hare
Chicago Rockford → Chicago → Appleton
Timetable, Chicago time
01:21UA 3874 from Chicago Rockford at the gate
16:15AA 3341 to Appleton leaves the gate
14 h 54 apart on the timetable
AA 3341 leaves 14 h 54 after UA 3874 arrives on the timetable: more than half a day, so not a connection we count.