CV 21 then AA 4504 at O'Hare
Anchorage → Chicago → Philadelphia
Timetable, Chicago time
01:25CV 21 from Anchorage at the gate
19:59AA 4504 to Philadelphia leaves the gate
18 h 34 apart on the timetable
AA 4504 leaves 18 h 34 after CV 21 arrives on the timetable: more than half a day, so not a connection we count.