CV 251 then AA 3239 at O'Hare
Anchorage → Chicago → Pittsburgh
Timetable, Chicago time
19:00CV 251 from Anchorage at the gate
12:29AA 3239 to Pittsburgh leaves the gate
17 h 29 apart on the timetable, overnight
AA 3239 leaves 17 h 29 after CV 251 arrives on the timetable: more than half a day, so not a connection we count.