CI 5240 then UA 4504 at O'Hare
Anchorage → Chicago → Sioux Falls
Timetable, Chicago time
19:25CI 5240 from Anchorage at the gate
08:40UA 4504 to Sioux Falls leaves the gate
13 h 15 apart on the timetable, overnight
UA 4504 leaves 13 h 15 after CI 5240 arrives on the timetable: more than half a day, so not a connection we count.