AA 4571 then UA 6080 at O'Hare
Grand Rapids → Chicago → Saginaw
Timetable, Chicago time
14:51AA 4571 from Grand Rapids at the gate
12:40UA 6080 to Saginaw leaves the gate
21 h 49 apart on the timetable, overnight
UA 6080 leaves 21 h 49 after AA 4571 arrives on the timetable: more than half a day, so not a connection we count.