AA 2764 then AA 1953 at Miami
Boston → Miami → St Louis
Timetable, Miami time
15:40AA 2764 from Boston at the gate
13:42AA 1953 to St Louis leaves the gate
22 h 02 apart on the timetable, overnight
AA 1953 leaves 22 h 02 after AA 2764 arrives on the timetable: more than half a day, so not a connection we count.