AA 111 then BR 643 at O'Hare
Rome → Chicago → Anchorage
Timetable, Chicago time
14:10AA 111 from Rome at the gate
11:55BR 643 to Anchorage leaves the gate
21 h 45 apart on the timetable, overnight
BR 643 leaves 21 h 45 after AA 111 arrives on the timetable: more than half a day, so not a connection we count.