AA 1227 then AA 2686 at Charlotte
Detroit → Charlotte → St Louis
Timetable, Charlotte time
09:44AA 1227 from Detroit at the gate
18:17AA 2686 to St Louis leaves the gate
8 h 33 apart on the timetable
The last days
AA 1227 and AA 2686 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.