DL 2858 then DL 1451 at Salt Lake City
Seattle (SEA) → Salt Lake City → Phoenix Sky Harbor
Timetable, Salt Lake City time
10:32DL 2858 from Seattle (SEA) at the gate
17:30DL 1451 to Phoenix Sky Harbor leaves the gate
6 h 58 apart on the timetable
The last days
DL 2858 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.