WN 3723 then WN 867 at Phoenix
San Diego → Phoenix → Denver
Timetable, Phoenix time
20:55WN 3723 from San Diego at the gate
21:50WN 867 to Denver leaves the gate
55 min apart on the timetable
The last days
WN 3723 and WN 867 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.