AA 5181 then AA 1992 at Charlotte
Washington → Charlotte → St Louis
Timetable, Charlotte time
06:38AA 5181 from Washington at the gate
08:40AA 1992 to St Louis leaves the gate
2 h 02 apart on the timetable
The last days
AA 5181 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.