AA 509 then F9 3059 at Miami
Houston → Miami → Atlanta
Timetable, Miami time
09:45AA 509 from Houston at the gate
11:45F9 3059 to Atlanta leaves the gate
2 h apart on the timetable
The last days
AA 509 and F9 3059 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.