AA 2361 then BR 643 at O'Hare
Atlanta → Chicago → Anchorage
Timetable, Chicago time
14:15AA 2361 from Atlanta at the gate
11:55BR 643 to Anchorage leaves the gate
21 h 40 apart on the timetable, overnight
BR 643 leaves 21 h 40 after AA 2361 arrives on the timetable: more than half a day, so not a connection we count.