AA 4920 then UA 6080 at O'Hare
Milwaukee → Chicago → Saginaw
Timetable, Chicago time
16:10AA 4920 from Milwaukee at the gate
13:25UA 6080 to Saginaw leaves the gate
21 h 15 apart on the timetable, overnight
UA 6080 leaves 21 h 15 after AA 4920 arrives on the timetable: more than half a day, so not a connection we count.