AA 3056 then AA 2148 at O'Hare
Miami → Chicago → Charlotte
Timetable, Chicago time
18:14AA 3056 from Miami at the gate
18:49AA 2148 to Charlotte leaves the gate
35 min apart on the timetable
The last days
AA 3056 and AA 2148 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.