AA 831 then AA 552 at Miami
Washington National → Miami → New York LaGuardia
Timetable, Miami time
07:43AA 831 from Washington National at the gate
14:21AA 552 to New York LaGuardia leaves the gate
6 h 38 apart on the timetable
The last days
AA 831 and AA 552 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.