AA 3890 then UA 4772 at O'Hare
Sioux Falls → Chicago → Columbia Regional
Timetable, Chicago time
16:40AA 3890 from Sioux Falls at the gate
12:45UA 4772 to Columbia Regional leaves the gate
20 h 05 apart on the timetable, overnight
UA 4772 leaves 20 h 05 after AA 3890 arrives on the timetable: more than half a day, so not a connection we count.