ET 3608 then AA 6227 at O'Hare
Anchorage → Chicago → Sioux Falls
Timetable, Chicago time
07:16ET 3608 from Anchorage at the gate
22:38AA 6227 to Sioux Falls leaves the gate
15 h 22 apart on the timetable
AA 6227 leaves 15 h 22 after ET 3608 arrives on the timetable: more than half a day, so not a connection we count.