AA 783 then AA 2648 at Miami
Tampa → Miami → Washington National
Timetable, Miami time
12:59AA 783 from Tampa at the gate
18:17AA 2648 to Washington National leaves the gate
5 h 18 apart on the timetable
The last days
AA 783 and AA 2648 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.