AA 642 then AA 1861 at O'Hare
Los Angeles → Chicago → San Diego
Timetable, Chicago time
07:05AA 642 from Los Angeles at the gate
21:20AA 1861 to San Diego leaves the gate
14 h 15 apart on the timetable
AA 1861 leaves 14 h 15 after AA 642 arrives on the timetable: more than half a day, so not a connection we count.