AA 1878 then AA 5599 at Charlotte
San Francisco → Charlotte → Springfield
Timetable, Charlotte time
16:34AA 1878 from San Francisco at the gate
15:36AA 5599 to Springfield leaves the gate
23 h 02 apart on the timetable, overnight
AA 5599 leaves 23 h 02 after AA 1878 arrives on the timetable: more than half a day, so not a connection we count.