AA 6348 then WN 2657 at Phoenix
Monterey → Phoenix → Denver
Timetable, Phoenix time
11:51AA 6348 from Monterey at the gate
20:35WN 2657 to Denver leaves the gate
8 h 44 apart on the timetable
The last days
AA 6348 and WN 2657 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.