AA 4931 then UA 6080 at O'Hare
Sioux Falls → Chicago → Saginaw
Timetable, Chicago time
14:13AA 4931 from Sioux Falls at the gate
13:25UA 6080 to Saginaw leaves the gate
23 h 12 apart on the timetable, overnight
UA 6080 leaves 23 h 12 after AA 4931 arrives on the timetable: more than half a day, so not a connection we count.