AA 6307 then UA 1807 at Phoenix
Tucson → Phoenix → Newark
Timetable, Phoenix time
08:53AA 6307 from Tucson at the gate
13:45UA 1807 to Newark leaves the gate
4 h 52 apart on the timetable
The last days
AA 6307 and UA 1807 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.