AA 2654 then AA 1266 at Miami
Phoenix → Miami → Jacksonville
Timetable, Miami time
05:00AA 2654 from Phoenix at the gate
09:50AA 1266 to Jacksonville leaves the gate
4 h 50 apart on the timetable
The last days
AA 2654 and AA 1266 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.