BR 646 then UA 2050 at O'Hare
Anchorage → Chicago → Denver
Timetable, Chicago time
17:10BR 646 from Anchorage at the gate
13:00UA 2050 to Denver leaves the gate
19 h 50 apart on the timetable, overnight
UA 2050 leaves 19 h 50 after BR 646 arrives on the timetable: more than half a day, so not a connection we count.