CA 8443 then UA 2857 at O'Hare
Anchorage → Chicago → Denver
Timetable, Chicago time
16:59CA 8443 from Anchorage at the gate
10:55UA 2857 to Denver leaves the gate
17 h 56 apart on the timetable, overnight
UA 2857 leaves 17 h 56 after CA 8443 arrives on the timetable: more than half a day, so not a connection we count.