AA 1741 then UA 5539 at O'Hare
Sacramento → Chicago → Moline
Timetable, Chicago time
05:00AA 1741 from Sacramento at the gate
21:47UA 5539 to Moline leaves the gate
16 h 47 apart on the timetable
UA 5539 leaves 16 h 47 after AA 1741 arrives on the timetable: more than half a day, so not a connection we count.