AA 9928 then UA 2472 at O'Hare
New York LaGuardia → Chicago → San Diego
Timetable, Chicago time
06:45AA 9928 from New York LaGuardia at the gate
20:02UA 2472 to San Diego leaves the gate
13 h 17 apart on the timetable
UA 2472 leaves 13 h 17 after AA 9928 arrives on the timetable: more than half a day, so not a connection we count.