AA 3960 then BR 643 at O'Hare
Valparaiso → Chicago → Anchorage
Timetable, Chicago time
14:34AA 3960 from Valparaiso at the gate
11:55BR 643 to Anchorage leaves the gate
21 h 21 apart on the timetable, overnight
BR 643 leaves 21 h 21 after AA 3960 arrives on the timetable: more than half a day, so not a connection we count.