BR 608 then UA 646 at O'Hare
Anchorage → Chicago → Denver
Timetable, Chicago time
20:03BR 608 from Anchorage at the gate
13:30UA 646 to Denver leaves the gate
17 h 27 apart on the timetable, overnight
UA 646 leaves 17 h 27 after BR 608 arrives on the timetable: more than half a day, so not a connection we count.