F9 3059 then DL 2902 at Atlanta
Miami → Atlanta → Washington
Timetable, Atlanta time
13:56F9 3059 from Miami at the gate
16:54DL 2902 to Washington leaves the gate
2 h 58 apart on the timetable
The last days
F9 3059 and DL 2902 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.