AA 1249 then AA 3181 at Miami
New York LaGuardia → Miami → Washington National
Timetable, Miami time
09:04AA 1249 from New York LaGuardia at the gate
12:20AA 3181 to Washington National leaves the gate
3 h 16 apart on the timetable
The last days
AA 1249 and AA 3181 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.