AA 712 then AA 1276 at Charlotte
St Louis → Charlotte → Phoenix
Timetable, Charlotte time
10:13AA 712 from St Louis at the gate
16:39AA 1276 to Phoenix leaves the gate
6 h 26 apart on the timetable
The last days
AA 712 and AA 1276 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.