AA 2745 then KJ 248 at O'Hare
Las Vegas → Chicago → Atlanta
Timetable, Chicago time
23:35AA 2745 from Las Vegas at the gate
17:30KJ 248 to Atlanta leaves the gate
17 h 55 apart on the timetable, overnight
KJ 248 leaves 17 h 55 after AA 2745 arrives on the timetable: more than half a day, so not a connection we count.