CA 8443 then UA 4535 at O'Hare
Anchorage → Chicago → Pittsburgh
Timetable, Chicago time
16:59CA 8443 from Anchorage at the gate
12:48UA 4535 to Pittsburgh leaves the gate
19 h 49 apart on the timetable, overnight
UA 4535 leaves 19 h 49 after CA 8443 arrives on the timetable: more than half a day, so not a connection we count.