UA 5634 then UA 5539 at O'Hare
Lexington → Chicago → Moline
Timetable, Chicago time
06:10UA 5634 from Lexington at the gate
21:47UA 5539 to Moline leaves the gate
15 h 37 apart on the timetable
UA 5539 leaves 15 h 37 after UA 5634 arrives on the timetable: more than half a day, so not a connection we count.