UA 3405 then UA 5539 at O'Hare
Grand Rapids → Chicago → Moline
Timetable, Chicago time
05:59UA 3405 from Grand Rapids at the gate
21:47UA 5539 to Moline leaves the gate
15 h 48 apart on the timetable
UA 5539 leaves 15 h 48 after UA 3405 arrives on the timetable: more than half a day, so not a connection we count.