WN 856 then WN 3321 at Phoenix
Burbank → Phoenix → Kansas City
Timetable, Phoenix time
12:15WN 856 from Burbank at the gate
16:15WN 3321 to Kansas City leaves the gate
4 h apart on the timetable
The last days
WN 856 and WN 3321 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.