AA 4212 then BR 643 at O'Hare
Providence → Chicago → Anchorage
Timetable, Chicago time
14:30AA 4212 from Providence at the gate
11:55BR 643 to Anchorage leaves the gate
21 h 25 apart on the timetable, overnight
BR 643 leaves 21 h 25 after AA 4212 arrives on the timetable: more than half a day, so not a connection we count.