AA 3591 then WN 964 at Phoenix
Monterey → Phoenix → Denver
Timetable, Phoenix time
09:05AA 3591 from Monterey at the gate
13:00WN 964 to Denver leaves the gate
3 h 55 apart on the timetable
The last days
AA 3591 and WN 964 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.