AA 3681 then BR 643 at O'Hare
Springfield Branson National → Chicago → Anchorage
Timetable, Chicago time
12:23AA 3681 from Springfield Branson National at the gate
11:55BR 643 to Anchorage leaves the gate
23 h 32 apart on the timetable, overnight
BR 643 leaves 23 h 32 after AA 3681 arrives on the timetable: more than half a day, so not a connection we count.