AA 4264 then FX 9791 at O'Hare
Sioux Falls → Chicago → Anchorage
Timetable, Chicago time
09:02AA 4264 from Sioux Falls at the gate
04:00FX 9791 to Anchorage leaves the gate
18 h 58 apart on the timetable, overnight
FX 9791 leaves 18 h 58 after AA 4264 arrives on the timetable: more than half a day, so not a connection we count.