WN 4715 then WN 668 at Phoenix
Tulsa → Phoenix → Denver
Timetable, Phoenix time
06:55WN 4715 from Tulsa at the gate
07:35WN 668 to Denver leaves the gate
40 min apart on the timetable
The last days
WN 4715 and WN 668 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.