CA 985 then UA 8180 at San Francisco
Beijing → San Francisco → Ontario
Timetable, San Francisco time
09:30CA 985 from Beijing at the gate
19:55UA 8180 to Ontario leaves the gate
10 h 25 apart on the timetable
The last days
CA 985 and UA 8180 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.