AA 1992 then AA 1662 at Charlotte
St Louis → Charlotte → Denver
Timetable, Charlotte time
08:00AA 1992 from St Louis at the gate
11:44AA 1662 to Denver leaves the gate
3 h 44 apart on the timetable
The last days
AA 1992 and AA 1662 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.