DL 4609 then DL 4150 at Seattle
Salt Lake City → Seattle → Spokane
Timetable, Seattle time
06:48DL 4609 from Salt Lake City at the gate
15:45DL 4150 to Spokane leaves the gate
8 h 57 apart on the timetable
Seattle’s board gives a departure time for only about 57% of its flights, so many days show no gate time.
The last days
DL 4609 and DL 4150 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.