UA 5329 then AA 3972 at O'Hare
Grand Rapids → Chicago → Bloomington-Normal
Timetable, Chicago time
13:02UA 5329 from Grand Rapids at the gate
12:59AA 3972 to Bloomington-Normal leaves the gate
23 h 57 apart on the timetable, overnight
AA 3972 leaves 23 h 57 after UA 5329 arrives on the timetable: more than half a day, so not a connection we count.