AA 2208 then BR 643 at O'Hare
St Louis → Chicago → Anchorage
Timetable, Chicago time
12:59AA 2208 from St Louis at the gate
11:55BR 643 to Anchorage leaves the gate
22 h 56 apart on the timetable, overnight
BR 643 leaves 22 h 56 after AA 2208 arrives on the timetable: more than half a day, so not a connection we count.