CV 251 then AA 4757 at O'Hare
Anchorage → Chicago → Pittsburgh
Timetable, Chicago time
19:00CV 251 from Anchorage at the gate
09:46AA 4757 to Pittsburgh leaves the gate
14 h 46 apart on the timetable, overnight
AA 4757 leaves 14 h 46 after CV 251 arrives on the timetable: more than half a day, so not a connection we count.