AA 1997 then KJ 248 at O'Hare
St Louis → Chicago → Atlanta
Timetable, Chicago time
09:00AA 1997 from St Louis at the gate
05:10KJ 248 to Atlanta leaves the gate
20 h 10 apart on the timetable, overnight
KJ 248 leaves 20 h 10 after AA 1997 arrives on the timetable: more than half a day, so not a connection we count.