AA 4979 then UA 3923 at Phoenix
Flagstaff → Phoenix → Denver
Timetable, Phoenix time
11:32AA 4979 from Flagstaff at the gate
22:10UA 3923 to Denver leaves the gate
10 h 38 apart on the timetable
The last days
AA 4979 and UA 3923 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.