UA 1007 then WN 4956 at Seattle
San Francisco → Seattle → Denver
Timetable, Seattle time
23:18UA 1007 from San Francisco at the gate
06:15WN 4956 to Denver leaves the gate
6 h 57 apart on the timetable, overnight
Seattle’s board gives a departure time for only about 55% of its flights, so many days show no gate time.
The last days
UA 1007 and WN 4956 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.