WN 1335 then WN 899 at Phoenix
Burbank → Phoenix → Salt Lake City
Timetable, Phoenix time
13:35WN 1335 from Burbank at the gate
20:05WN 899 to Salt Lake City leaves the gate
6 h 30 apart on the timetable
The last days
WN 1335 and WN 899 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.