AA 3649 then B6 8716 at Phoenix
Tucson → Phoenix → Newark
Timetable, Phoenix time
09:45AA 3649 from Tucson at the gate
16:00B6 8716 to Newark leaves the gate
6 h 15 apart on the timetable
The last days
AA 3649 and B6 8716 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.