BR 646 then UA 3484 at O'Hare
Anchorage → Chicago → Pittsburgh
Timetable, Chicago time
17:10BR 646 from Anchorage at the gate
15:45UA 3484 to Pittsburgh leaves the gate
22 h 35 apart on the timetable, overnight
UA 3484 leaves 22 h 35 after BR 646 arrives on the timetable: more than half a day, so not a connection we count.