UA 4551 then CX 99 at O'Hare
Sioux Falls → Chicago → Anchorage
Timetable, Chicago time
07:55UA 4551 from Sioux Falls at the gate
21:15CX 99 to Anchorage leaves the gate
13 h 20 apart on the timetable
CX 99 leaves 13 h 20 after UA 4551 arrives on the timetable: more than half a day, so not a connection we count.