AA 1204 then AA 1153 at Charlotte
Buffalo → Charlotte → San Antonio
Timetable, Charlotte time
07:50AA 1204 from Buffalo at the gate
20:44AA 1153 to San Antonio leaves the gate
12 h 54 apart on the timetable
AA 1153 leaves 12 h 54 after AA 1204 arrives on the timetable: more than half a day, so not a connection we count.