CA 985 then QR 2005 at San Francisco
Beijing → San Francisco → Redmond
Timetable, San Francisco time
09:30CA 985 from Beijing at the gate
13:17QR 2005 to Redmond leaves the gate
3 h 47 apart on the timetable
The last days
CA 985 and QR 2005 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.