CV 12 then UA 719 at O'Hare
Anchorage → Chicago → Denver
Timetable, Chicago time
19:11CV 12 from Anchorage at the gate
16:20UA 719 to Denver leaves the gate
21 h 09 apart on the timetable, overnight
UA 719 leaves 21 h 09 after CV 12 arrives on the timetable: more than half a day, so not a connection we count.