AA 401 then DL 1579 at Miami
Washington National → Miami → Atlanta
Timetable, Miami time
12:08AA 401 from Washington National at the gate
15:50DL 1579 to Atlanta leaves the gate
3 h 42 apart on the timetable
The last days
AA 401 and DL 1579 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.