AA 1399 then AA 457 at Miami
Pittsburgh → Miami → San Juan
Timetable, Miami time
09:00AA 1399 from Pittsburgh at the gate
13:00AA 457 to San Juan leaves the gate
4 h apart on the timetable
The last days
AA 1399 and AA 457 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.