UA 6047 then AA 1785 at O'Hare
Pittsburgh → Chicago → San Diego
Timetable, Chicago time
20:31UA 6047 from Pittsburgh at the gate
20:01AA 1785 to San Diego leaves the gate
23 h 30 apart on the timetable, overnight
AA 1785 leaves 23 h 30 after UA 6047 arrives on the timetable: more than half a day, so not a connection we count.