AA 3146 then AA 1992 at Charlotte
Las Vegas → Charlotte → St Louis
Timetable, Charlotte time
06:10AA 3146 from Las Vegas at the gate
08:48AA 1992 to St Louis leaves the gate
2 h 38 apart on the timetable
The last days
AA 3146 and AA 1992 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.