AA 4931 then UA 4772 at O'Hare
Sioux Falls → Chicago → Columbia Regional
Timetable, Chicago time
14:13AA 4931 from Sioux Falls at the gate
12:45UA 4772 to Columbia Regional leaves the gate
22 h 32 apart on the timetable, overnight
UA 4772 leaves 22 h 32 after AA 4931 arrives on the timetable: more than half a day, so not a connection we count.