AA 2202 then KJ 248 at O'Hare
Buffalo → Chicago → Atlanta
Timetable, Chicago time
20:00AA 2202 from Buffalo at the gate
11:35KJ 248 to Atlanta leaves the gate
15 h 35 apart on the timetable, overnight
KJ 248 leaves 15 h 35 after AA 2202 arrives on the timetable: more than half a day, so not a connection we count.