AA 1878 then AA 5543 at Charlotte
San Francisco → Charlotte → Pittsburgh
Timetable, Charlotte time
16:34AA 1878 from San Francisco at the gate
08:35AA 5543 to Pittsburgh leaves the gate
16 h 01 apart on the timetable, overnight
AA 5543 leaves 16 h 01 after AA 1878 arrives on the timetable: more than half a day, so not a connection we count.