CA 3103 then UA 646 at O'Hare
Anchorage → Chicago → Denver
Timetable, Chicago time
15:07CA 3103 from Anchorage at the gate
13:30UA 646 to Denver leaves the gate
22 h 23 apart on the timetable, overnight
UA 646 leaves 22 h 23 after CA 3103 arrives on the timetable: more than half a day, so not a connection we count.