WN 477 then WN 867 at Phoenix
Boise → Phoenix → Denver
Timetable, Phoenix time
10:40WN 477 from Boise at the gate
21:50WN 867 to Denver leaves the gate
11 h 10 apart on the timetable
The last days
WN 477 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.