BR 646 then UA 5917 at O'Hare
Anchorage → Chicago → Roanoke
Timetable, Chicago time
10:40BR 646 from Anchorage at the gate
10:25UA 5917 to Roanoke leaves the gate
23 h 45 apart on the timetable, overnight
UA 5917 leaves 23 h 45 after BR 646 arrives on the timetable: more than half a day, so not a connection we count.