AA 9928 then 5X 609 at O'Hare
New York LaGuardia → Chicago → Philadelphia
Timetable, Chicago time
06:45AA 9928 from New York LaGuardia at the gate
22:005X 609 to Philadelphia leaves the gate
15 h 15 apart on the timetable
5X 609 leaves 15 h 15 after AA 9928 arrives on the timetable: more than half a day, so not a connection we count.