VA 8291 then UA 8253 at San Francisco
Seattle → San Francisco → Washington
Timetable, San Francisco time
11:24VA 8291 from Seattle at the gatealso NZ 9427
18:30UA 8253 to Washington leaves the gate
7 h 06 apart on the timetable
The last days
VA 8291 and UA 8253 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.