AA 1799 then AA 857 at Miami
Austin → Miami → Washington National
Timetable, Miami time
08:40AA 1799 from Austin at the gate
16:26AA 857 to Washington National leaves the gate
7 h 46 apart on the timetable
The last days
AA 1799 and AA 857 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.