AA 1102 then AA 2880 at Miami
Cancún → Miami → Atlanta
Timetable, Miami time
13:37AA 1102 from Cancún at the gate
14:15AA 2880 to Atlanta leaves the gate
38 min apart on the timetable
The last days
AA 1102 and AA 2880 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.