WN 1644 then WN 4313 at Denver
Salt Lake City → Denver → Burbank
Timetable, Denver time
07:20WN 1644 from Salt Lake City at the gate
12:05WN 4313 to Burbank leaves the gate
4 h 45 apart on the timetable
The last days
WN 1644 and WN 4313 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.