UA 1540 then UA 5539 at O'Hare
Toronto Pearson → Chicago → Moline
Timetable, Chicago time
07:54UA 1540 from Toronto Pearson at the gate
21:47UA 5539 to Moline leaves the gate
13 h 53 apart on the timetable
UA 5539 leaves 13 h 53 after UA 1540 arrives on the timetable: more than half a day, so not a connection we count.