AA 678 then AA 5532 at Houston
Miami → Houston → Washington National
Timetable, Houston time
16:44AA 678 from Miami at the gate
17:20AA 5532 to Washington National leaves the gate
36 min apart on the timetable
The last days
AA 678 and AA 5532 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.