F9 1572 then WN 506 at Phoenix
San Diego → Phoenix → Denver
Timetable, Phoenix time
13:41F9 1572 from San Diego at the gate
14:55WN 506 to Denver leaves the gate
1 h 14 apart on the timetable
The last days
F9 1572 and WN 506 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.