AA 5553 then AA 2037 at Charlotte
Knoxville → Charlotte → Memphis
Timetable, Charlotte time
08:20AA 5553 from Knoxville at the gate
09:05AA 2037 to Memphis leaves the gate
45 min apart on the timetable
The last days
AA 5553 and AA 2037 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.