AA 1878 then AA 2937 at Charlotte
San Francisco → Charlotte → St Louis
Timetable, Charlotte time
16:34AA 1878 from San Francisco at the gate
16:28AA 2937 to St Louis leaves the gate
23 h 54 apart on the timetable, overnight
AA 2937 leaves 23 h 54 after AA 1878 arrives on the timetable: more than half a day, so not a connection we count.