DL 4011 then UA 439 at Denver
Atlanta → Denver → Phoenix Sky Harbor
Timetable, Denver time
11:30DL 4011 from Atlanta at the gate
20:50UA 439 to Phoenix Sky Harbor leaves the gate
9 h 20 apart on the timetable
The last days
DL 4011 and UA 439 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.