AA 6457 then AA 1841 at Phoenix
Tucson → Phoenix → Ontario
Timetable, Phoenix time
21:26AA 6457 from Tucson at the gate
21:35AA 1841 to Ontario leaves the gate
9 min apart on the timetable
The last days
AA 6457 and AA 1841 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.