F9 3220 then WN 554 at Denver
Salt Lake City → Denver → Phoenix Sky Harbor
Timetable, Denver time
13:19F9 3220 from Salt Lake City at the gate
19:40WN 554 to Phoenix Sky Harbor leaves the gate
6 h 21 apart on the timetable
The last days
F9 3220 and WN 554 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.