AA 6307 then AA 2721 at Phoenix
Tucson → Phoenix → Philadelphia
Timetable, Phoenix time
08:53AA 6307 from Tucson at the gate
13:03AA 2721 to Philadelphia leaves the gate
4 h 10 apart on the timetable
The last days
AA 6307 and AA 2721 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.