CV 251 then AA 4498 at O'Hare
Anchorage → Chicago → Harrisburg
Timetable, Chicago time
19:00CV 251 from Anchorage at the gate
11:45AA 4498 to Harrisburg leaves the gate
16 h 45 apart on the timetable, overnight
AA 4498 leaves 16 h 45 after CV 251 arrives on the timetable: more than half a day, so not a connection we count.