UA 5891 then BR 647 at O'Hare
Roanoke → Chicago → Anchorage
Timetable, Chicago time
11:54UA 5891 from Roanoke at the gate
09:35BR 647 to Anchorage leaves the gate
21 h 41 apart on the timetable, overnight
BR 647 leaves 21 h 41 after UA 5891 arrives on the timetable: more than half a day, so not a connection we count.