AA 1565 then BR 643 at O'Hare
Tucson → Chicago → Anchorage
Timetable, Chicago time
12:35AA 1565 from Tucson at the gate
11:25BR 643 to Anchorage leaves the gate
22 h 50 apart on the timetable, overnight
BR 643 leaves 22 h 50 after AA 1565 arrives on the timetable: more than half a day, so not a connection we count.