UA 1803 then UA 5539 at O'Hare
Pittsburgh → Chicago → Moline
Timetable, Chicago time
07:23UA 1803 from Pittsburgh at the gate
21:47UA 5539 to Moline leaves the gate
14 h 24 apart on the timetable
UA 5539 leaves 14 h 24 after UA 1803 arrives on the timetable: more than half a day, so not a connection we count.