DL 9963 then DL 3692 at Seattle
Salt Lake City → Seattle → Boise
Timetable, Seattle time
10:50DL 9963 from Salt Lake City at the gate
19:50DL 3692 to Boise leaves the gate
9 h 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 9963 and DL 3692 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.