KJ 248 then AA 4557 at Atlanta
Chicago O'Hare → Atlanta → New York LaGuardia
Timetable, Atlanta time
14:25KJ 248 from Chicago O'Hare at the gate
09:39AA 4557 to New York LaGuardia leaves the gate
19 h 14 apart on the timetable, overnight
AA 4557 leaves 19 h 14 after KJ 248 arrives on the timetable: more than half a day, so not a connection we count.