CA 1011 then UA 4504 at O'Hare
Anchorage → Chicago → Sioux Falls
Timetable, Chicago time
17:12CA 1011 from Anchorage at the gate
08:40UA 4504 to Sioux Falls leaves the gate
15 h 28 apart on the timetable, overnight
UA 4504 leaves 15 h 28 after CA 1011 arrives on the timetable: more than half a day, so not a connection we count.