AA 3035 then AA 1252 at Philadelphia
San Francisco → Philadelphia → Miami
Timetable, Philadelphia time
23:38AA 3035 from San Francisco at the gate
06:00AA 1252 to Miami leaves the gate
6 h 22 apart on the timetable, overnight
The last days
AA 3035 and AA 1252 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.