DL 9965 then DL 637 at Seattle
Kailua-Kona → Seattle → Chicago O'Hare
Timetable, Seattle time
02:28DL 9965 from Kailua-Kona at the gate
10:39DL 637 to Chicago O'Hare leaves the gate
8 h 11 apart on the timetable
Seattle’s board gives a departure time for only about 59% of its flights, so many days show no gate time.
The last days
DL 9965 and DL 637 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.