DL 3744 then DL 1451 at Salt Lake City
Spokane → Salt Lake City → Phoenix Sky Harbor
Timetable, Salt Lake City time
12:47DL 3744 from Spokane at the gate
17:30DL 1451 to Phoenix Sky Harbor leaves the gate
4 h 43 apart on the timetable
The last days
DL 3744 and DL 1451 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.