DL 3717 then WN 1921 at Salt Lake City
Tucson → Salt Lake City → Phoenix
Timetable, Salt Lake City time
19:34DL 3717 from Tucson at the gate
21:25WN 1921 to Phoenix leaves the gate
1 h 51 apart on the timetable
The last days
DL 3717 and WN 1921 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.