UA 4537 then CX 99 at O'Hare
Roanoke → Chicago → Anchorage
Timetable, Chicago time
07:44UA 4537 from Roanoke at the gate
21:15CX 99 to Anchorage leaves the gate
13 h 31 apart on the timetable
CX 99 leaves 13 h 31 after UA 4537 arrives on the timetable: more than half a day, so not a connection we count.