AA 3405 then KJ 248 at O'Hare
Syracuse → Chicago → Atlanta
Timetable, Chicago time
20:18AA 3405 from Syracuse at the gate
17:30KJ 248 to Atlanta leaves the gate
21 h 12 apart on the timetable, overnight
KJ 248 leaves 21 h 12 after AA 3405 arrives on the timetable: more than half a day, so not a connection we count.