AA 6450 then AA 3356 at O'Hare
Cleveland → Chicago → Memphis
Timetable, Chicago time
11:10AA 6450 from Cleveland at the gate
11:55AA 3356 to Memphis leaves the gate
45 min apart on the timetable
The last days
AA 6450 and AA 3356 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.