UA 3524 then UA 5539 at O'Hare
Columbus (Ohio) → Chicago → Moline
Timetable, Chicago time
05:56UA 3524 from Columbus (Ohio) at the gate
21:47UA 5539 to Moline leaves the gate
15 h 51 apart on the timetable
UA 5539 leaves 15 h 51 after UA 3524 arrives on the timetable: more than half a day, so not a connection we count.