AA 6255 then UA 3910 at O'Hare
Sioux Falls → Chicago → Newark
Timetable, Chicago time
17:29AA 6255 from Sioux Falls at the gate
07:30UA 3910 to Newark leaves the gate
14 h 01 apart on the timetable, overnight
UA 3910 leaves 14 h 01 after AA 6255 arrives on the timetable: more than half a day, so not a connection we count.