CA 8443 then UA 646 at O'Hare
Anchorage → Chicago → Denver
Timetable, Chicago time
16:59CA 8443 from Anchorage at the gate
13:30UA 646 to Denver leaves the gate
20 h 31 apart on the timetable, overnight
UA 646 leaves 20 h 31 after CA 8443 arrives on the timetable: more than half a day, so not a connection we count.