DL 2016 then DL 9774 at Seattle
Salt Lake City → Seattle → Anchorage
Timetable, Seattle time
22:05DL 2016 from Salt Lake City at the gate
07:00DL 9774 to Anchorage leaves the gate
8 h 55 apart on the timetable, overnight
Seattle’s board gives a departure time for only about 56% of its flights, so many days show no gate time.
The last days
DL 2016 and DL 9774 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.