UA 5244 then UA 5539 at O'Hare
Dayton → Chicago → Moline
Timetable, Chicago time
07:51UA 5244 from Dayton at the gate
21:47UA 5539 to Moline leaves the gate
13 h 56 apart on the timetable
UA 5539 leaves 13 h 56 after UA 5244 arrives on the timetable: more than half a day, so not a connection we count.