DL 1317 then DL 1423 at Salt Lake City
Denver → Salt Lake City → Sacramento
Timetable, Salt Lake City time
12:21DL 1317 from Denver at the gate
17:11DL 1423 to Sacramento leaves the gate
4 h 50 apart on the timetable
The last days
DL 1317 and DL 1423 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.