DL 4190 then DL 4446 at Salt Lake City
Aspen → Salt Lake City → Boise
Timetable, Salt Lake City time
15:07DL 4190 from Aspen at the gate
20:40DL 4446 to Boise leaves the gate
5 h 33 apart on the timetable
The last days
DL 4190 and DL 4446 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.