AA 9928 then AA 1448 at O'Hare
New York LaGuardia → Chicago → Harrisburg
Timetable, Chicago time
06:45AA 9928 from New York LaGuardia at the gate
19:20AA 1448 to Harrisburg leaves the gate
12 h 35 apart on the timetable
AA 1448 leaves 12 h 35 after AA 9928 arrives on the timetable: more than half a day, so not a connection we count.