UA 4488 then KD 211 at O'Hare
Sioux Falls → Chicago → Anchorage
Timetable, Chicago time
17:05UA 4488 from Sioux Falls at the gate
12:00KD 211 to Anchorage leaves the gate
18 h 55 apart on the timetable, overnight
KD 211 leaves 18 h 55 after UA 4488 arrives on the timetable: more than half a day, so not a connection we count.