AA 5408 then BR 643 at O'Hare
Knoxville → Chicago → Anchorage
Timetable, Chicago time
12:40AA 5408 from Knoxville at the gate
11:55BR 643 to Anchorage leaves the gate
23 h 15 apart on the timetable, overnight
BR 643 leaves 23 h 15 after AA 5408 arrives on the timetable: more than half a day, so not a connection we count.