AA 6255 then G7 3376 at O'Hare
Sioux Falls → Chicago → St Louis
Timetable, Chicago time
17:29AA 6255 from Sioux Falls at the gate
11:00G7 3376 to St Louis leaves the gate
17 h 31 apart on the timetable, overnight
G7 3376 leaves 17 h 31 after AA 6255 arrives on the timetable: more than half a day, so not a connection we count.